About this index & how it's been checked

The Aging Vulnerability Index (AVI) is this platform's own construction, modeled on the CDC/ATSDR Social Vulnerability Index methodology but not a CDC product and not independently validated. It combines Census ACS data on the population 65 and older — demographic aging pressure, economic precarity, health/disability/isolation, and housing/transportation burden — into a single percentile ranking of U.S. counties. The underlying inputs are official Census data; the index construction and weighting are this platform's own.

Reference-county check

A face-validity check against real counties with well-documented age profiles — the same method used to calibrate this platform's seasonal-community threshold. Higher percentile = more aging-vulnerable.

  • ✓ Sumter County, FL — 79.8th percentile (expected HIGH, The Villages — often cited as the oldest-median-age U.S. county)
  • ✓ Charlotte County, FL — 90.8th percentile (expected HIGH, Retirement destination)
  • ✓ Citrus County, FL — 88.1th percentile (expected HIGH, Retirement destination)
  • ✓ Highlands County, FL — 95.9th percentile (expected HIGH, Retirement destination)
  • ✓ Brazos County, TX — 17.0th percentile (expected LOW, Texas A&M)
  • ✓ Story County, IA — 8.9th percentile (expected LOW, Iowa State)
  • ✓ Whitman County, WA — 10.3th percentile (expected LOW, Washington State University)
  • ✓ Tompkins County, NY — 7.6th percentile (expected LOW, Cornell)

Highest / lowest AVI by county population

Under 50,000

Highest
  1. Catron County, NM — 100.0th pctile (pop. 3,743)
  2. De Baca County, NM — 99.9th pctile (pop. 1,576)
  3. Ozark County, MO — 99.8th pctile (pop. 8,873)
  4. Scott County, VA — 99.6th pctile (pop. 21,479)
  5. Harney County, OR — 99.6th pctile (pop. 7,499)
Lowest
  1. Martin County, TX — 0.0th pctile (pop. 5,218)
  2. Jim Hogg County, TX — 0.1th pctile (pop. 4,727)
  3. Haskell County, KS — 0.1th pctile (pop. 3,641)
  4. Hanson County, SD — 0.1th pctile (pop. 3,472)
  5. Trousdale County, TN — 0.2th pctile (pop. 11,957)

50,000-99,999

Highest
  1. Nye County, NV — 96.7th pctile (pop. 54,344)
  2. Gila County, AZ — 96.7th pctile (pop. 53,795)
  3. Raleigh County, WV — 96.0th pctile (pop. 73,195)
  4. Wilkes County, NC — 95.6th pctile (pop. 65,935)
  5. Pittsylvania County, VA — 94.0th pctile (pop. 59,856)
Lowest
  1. Oldham County, KY — 0.0th pctile (pop. 69,257)
  2. Eagle County, CO — 0.2th pctile (pop. 55,135)
  3. Lincoln County, SD — 0.5th pctile (pop. 70,638)
  4. Johnson County, MO — 0.9th pctile (pop. 54,732)
  5. Lafayette County, MS — 1.3th pctile (pop. 58,327)

100,000-299,999

Highest
  1. Highlands County, FL — 95.9th pctile (pop. 105,702)
  2. Mohave County, AZ — 93.9th pctile (pop. 220,517)
  3. Douglas County, OR — 93.0th pctile (pop. 112,072)
  4. Charlotte County, FL — 90.8th pctile (pop. 201,064)
  5. Indian River County, FL — 90.3th pctile (pop. 166,936)
Lowest
  1. Union County, NC — 0.8th pctile (pop. 250,958)
  2. Scott County, MN — 1.1th pctile (pop. 154,557)
  3. Williamson County, TN — 1.2th pctile (pop. 260,351)
  4. St. Mary's County, MD — 1.3th pctile (pop. 115,126)
  5. Dallas County, IA — 1.5th pctile (pop. 107,968)

300,000 and higher

Highest
  1. Pinellas County, FL — 90.1th pctile (pop. 963,481)
  2. Collier County, FL — 89.9th pctile (pop. 398,291)
  3. Marion County, FL — 87.1th pctile (pop. 400,078)
  4. Lee County, FL — 86.1th pctile (pop. 817,666)
  5. Palm Beach County, FL — 85.0th pctile (pop. 1,533,806)
Lowest
  1. Hamilton County, IN — 0.6th pctile (pop. 365,056)
  2. Prince William Count, VA — 2.1th pctile (pop. 488,880)
  3. Davis County, UT — 2.1th pctile (pop. 370,924)
  4. Douglas County, CO — 2.2th pctile (pop. 377,150)
  5. Loudoun County, VA — 2.4th pctile (pop. 432,998)
Compare
NationallyWithin its state

IL — Aging Vulnerability Index

Candidate index, not validated against ground truth — 2020–2024 ACS 5-year
IL — Aging Vulnerability Index by county
Adams County — 70 (Upper-middle)Alexander County — 96 (Higher)Bond County — 33 (Lower-middle)Boone County — 13 (Lower)Brown County — 2 (Lower)Bureau County — 74 (Upper-middle)Calhoun County — 47 (Lower-middle)Carroll County — 66 (Upper-middle)Cass County — 61 (Middle)Champaign County — 10 (Lower)Christian County — 39 (Lower-middle)Clark County — 31 (Lower)Clay County — 96 (Higher)Clinton County — 14 (Lower)Coles County — 50 (Middle)Cook County — 41 (Lower-middle)Crawford County — 20 (Lower)Cumberland County — 50 (Middle)DeKalb County — 12 (Lower)De Witt County — 48 (Lower-middle)Douglas County — 67 (Upper-middle)DuPage County — 9 (Lower)Edgar County — 73 (Upper-middle)Edwards County — 91 (Higher)Effingham County — 26 (Lower)Fayette County — 49 (Lower-middle)Ford County — 66 (Upper-middle)Franklin County — 91 (Higher)Fulton County — 56 (Middle)Gallatin County — 99 (Higher)Greene County — 40 (Lower-middle)Grundy County — 13 (Lower)Hamilton County — 93 (Higher)Hancock County — 90 (Higher)Hardin County — 92 (Higher)Henderson County — 87 (Higher)Henry County — 65 (Upper-middle)Iroquois County — 66 (Upper-middle)Jackson County — 47 (Lower-middle)Jasper County — 50 (Middle)Jefferson County — 64 (Upper-middle)Jersey County — 15 (Lower)Jo Daviess County — 90 (Higher)Johnson County — 61 (Middle)Kane County — 13 (Lower)Kankakee County — 35 (Lower-middle)Kendall County — 3 (Lower)Knox County — 80 (Higher)Lake County — 7 (Lower)LaSalle County — 47 (Lower-middle)Lawrence County — 28 (Lower)Lee County — 53 (Middle)Livingston County — 59 (Middle)Logan County — 57 (Middle)McDonough County — 80 (Higher)McHenry County — 5 (Lower)McLean County — 15 (Lower)Macon County — 85 (Higher)Macoupin County — 51 (Middle)Madison County — 36 (Lower-middle)Marion County — 71 (Upper-middle)Marshall County — 59 (Middle)Mason County — 52 (Middle)Massac County — 55 (Middle)Menard County — 27 (Lower)Mercer County — 35 (Lower-middle)Monroe County — 43 (Lower-middle)Montgomery County — 72 (Upper-middle)Morgan County — 51 (Middle)Moultrie County — 73 (Upper-middle)Ogle County — 57 (Middle)Peoria County — 37 (Lower-middle)Perry County — 54 (Middle)Piatt County — 37 (Lower-middle)Pike County — 64 (Upper-middle)Pope County — 78 (Upper-middle)Pulaski County — 97 (Higher)Putnam County — 80 (Upper-middle)Randolph County — 49 (Lower-middle)Richland County — 73 (Upper-middle)Rock Island County — 50 (Middle)St. Clair County — 31 (Lower-middle)Saline County — 88 (Higher)Sangamon County — 46 (Lower-middle)Schuyler County — 76 (Upper-middle)Scott County — 86 (Higher)Shelby County — 71 (Upper-middle)Stark County — 45 (Lower-middle)Stephenson County — 79 (Upper-middle)Tazewell County — 54 (Middle)Union County — 92 (Higher)Vermilion County — 46 (Lower-middle)Wabash County — 82 (Higher)Warren County — 67 (Upper-middle)Washington County — 53 (Middle)Wayne County — 92 (Higher)White County — 98 (Higher)Whiteside County — 81 (Higher)Will County — 6 (Lower)Williamson County — 53 (Middle)Winnebago County — 58 (Middle)Woodford County — 24 (Lower)
Where this is
Shading: Aging Vulnerability Index
Lower (2 to 31)Lower-middle (31 to 49)Middle (50 to 61)Upper-middle (64 to 80)Higher (80 to 99)
Each unit is shaded by its Aging Vulnerability Index value and grouped into equal-count bands (quantiles) against the other units shown — lighter = lower, darker = higher. It ranks position among the units in view; it does not grade places, and the ranges shift with which units are shown.
The map is bounded to this parent geography — it shows the selected unit among its own siblings only, the same depth rule the drill-down uses. Shading ranks position on the measure among the units shown; it does not grade places.

Click a county to see its overall percentile and theme scores. Some counties have county-subdivision or census-tract detail loaded — clicking one goes straight to whichever it has.

Median county: 54th percentile (among all U.S. counties).
These counties span the 2nd percentile to the 99th percentile. The width of that range is the internal disparity.
Well above the median19 (19%)
Above the median24 (24%)
Near the median30 (29%)
Below the median14 (14%)
Well below the median15 (15%)
Widest spread across these counties: Health, Disability & Isolation — this theme most separates the higher- and lower-ranked counties here.
AVI ranks each county's position relative to a comparison set; it is not averaged into one number for the area, because percentiles do not average meaningfully. The distribution — median, range, and shape below — is the summary.
Well above the median — 19 counties (80th–100th percentile)
Gallatin County — 99th percentile — Well above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Health, Disability & Isolation ‡ (well above) and Social Isolation (well above); near the median on Economic Precarity, 65+ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
White County — 98th percentile — Well above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Economic Precarity, 65+ (above), Housing & Transportation, 65+ (well above) and Social Isolation (well above); below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Pulaski County — 97th percentile — Well above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (well above), Health, Disability & Isolation ‡ (well above) and Social Isolation (well above); below the median on Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Clay County — 96th percentile — Well above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (well above), Housing & Transportation, 65+ ‡ (well above) and Social Isolation (well above); near the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Alexander County — 96th percentile — Well above the median 4 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Health, Disability & Isolation ‡ (above) and Social Isolation (well above); near the median on Economic Precarity, 65+; below the median on Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Hamilton County — 93rd percentile — Well above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Housing & Transportation, 65+ ‡ (well above) and Social Isolation (well above); below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Hardin County — 92nd percentile — Well above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above) and Social Isolation (well above); near the median on Health, Disability & Isolation ‡; below the median on Economic Precarity, 65+ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Union County — 92nd percentile — Well above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Economic Precarity, 65+ (well above) and Social Isolation (well above); near the median on Housing & Transportation, 65+ ‡; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Wayne County — 92nd percentile — Well above the median View by census tract →
Driven by Demographic Aging Pressure (well above), Economic Precarity, 65+ (above), Housing & Transportation, 65+ (well above) and Social Isolation (well above); below the median on Health, Disability & Isolation.
Edwards County — 91st percentile — Well above the median 4 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Health, Disability & Isolation ‡ (well above) and Social Isolation (above); near the median on Economic Precarity, 65+; below the median on Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Franklin County — 91st percentile — Well above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (above), Health, Disability & Isolation ‡ (well above) and Social Isolation (well above); below the median on Housing & Transportation, 65+.
‡ theme includes at least one flagged input.
Jo Daviess County — 90th percentile — Well above the median 2 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above) and Housing & Transportation, 65+ ‡ (well above); near the median on Health, Disability & Isolation ‡ and Social Isolation; below the median on Economic Precarity, 65+.
‡ theme includes at least one flagged input.
Hancock County — 90th percentile — Well above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Health, Disability & Isolation ‡ (above) and Social Isolation (well above); near the median on Economic Precarity, 65+; below the median on Housing & Transportation, 65+.
‡ theme includes at least one flagged input.
Saline County — 88th percentile — Well above the median View by census tract →
Driven by Demographic Aging Pressure (above), Housing & Transportation, 65+ (well above) and Social Isolation (well above); near the median on Economic Precarity, 65+; below the median on Health, Disability & Isolation.
Henderson County — 87th percentile — Well above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above) and Social Isolation (well above); near the median on Health, Disability & Isolation ‡; below the median on Economic Precarity, 65+ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Scott County — 86th percentile — Well above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above) and Social Isolation (well above); near the median on Economic Precarity, 65+ and Housing & Transportation, 65+ ‡; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Macon County — 85th percentile — Well above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (above); near the median on Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Wabash County — 82nd percentile — Well above the median 2 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (above), Housing & Transportation, 65+ ‡ (well above) and Social Isolation (above); below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Whiteside County — 81st percentile — Well above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Health, Disability & Isolation ‡ (above) and Social Isolation (above); near the median on Economic Precarity, 65+; below the median on Housing & Transportation, 65+.
‡ theme includes at least one flagged input.
Above the median — 24 counties (60th–80th percentile)
Knox County — 80th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (above), Housing & Transportation, 65+ (well above) and Social Isolation (well above); below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
McDonough County — 80th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above), Housing & Transportation, 65+ (well above) and Social Isolation (above); near the median on Demographic Aging Pressure and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Putnam County — 80th percentile — Above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Health, Disability & Isolation ‡ (above) and Social Isolation (above); below the median on Economic Precarity, 65+ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Stephenson County — 79th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above) and Housing & Transportation, 65+ (above); near the median on Economic Precarity, 65+ and Social Isolation; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Pope County — 78th percentile — Above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above), Economic Precarity, 65+ (well above) and Social Isolation (well above); below the median on Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Schuyler County — 76th percentile — Above the median 4 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Economic Precarity, 65+ (well above); near the median on Housing & Transportation, 65+ ‡ and Social Isolation; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Bureau County — 74th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above) and Housing & Transportation, 65+ (above); near the median on Social Isolation; below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Richland County — 73rd percentile — Above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Health, Disability & Isolation ‡ (above) and Social Isolation (above); near the median on Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+.
‡ theme includes at least one flagged input.
Moultrie County — 73rd percentile — Above the median 2 of 12 flagged View by census tract →
Driven by Health, Disability & Isolation ‡ (above) and Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Edgar County — 73rd percentile — Above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above) and Social Isolation (above); near the median on Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Montgomery County — 72nd percentile — Above the median 2 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Housing & Transportation, 65+ (well above) and Social Isolation (above); near the median on Economic Precarity, 65+; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Shelby County — 71st percentile — Above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Housing & Transportation, 65+ ‡ (above); near the median on Social Isolation; below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Marion County — 71st percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (above), Housing & Transportation, 65+ (well above) and Social Isolation (well above); below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Adams County — 70th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Housing & Transportation, 65+ (above); near the median on Economic Precarity, 65+, Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Douglas County — 67th percentile — Above the median View by census tract →
Driven by Health, Disability & Isolation (well above) and Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure and Social Isolation; below the median on Economic Precarity, 65+.
Warren County — 67th percentile — Above the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Economic Precarity, 65+ (above); near the median on Health, Disability & Isolation ‡ and Social Isolation; below the median on Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Ford County — 66th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (well above) and Social Isolation (above); near the median on Demographic Aging Pressure and Economic Precarity, 65+; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Carroll County — 66th percentile — Above the median 2 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Health, Disability & Isolation ‡ (above) and Social Isolation (above); below the median on Economic Precarity, 65+ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Iroquois County — 66th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Social Isolation (above); near the median on Economic Precarity, 65+; below the median on Health, Disability & Isolation ‡ and Housing & Transportation, 65+.
‡ theme includes at least one flagged input.
Henry County — 65th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Housing & Transportation, 65+ (above) and Social Isolation (above); below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Jefferson County — 64th percentile — Above the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (above); near the median on Demographic Aging Pressure, Economic Precarity, 65+, Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Pike County — 64th percentile — Above the median 2 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Social Isolation (well above); near the median on Economic Precarity, 65+; below the median on Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Johnson County — 61st percentile — Above the median 2 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Social Isolation (above); near the median on Demographic Aging Pressure, Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Cass County — 61st percentile — Above the median 2 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above), Housing & Transportation, 65+ (well above) and Social Isolation (above); below the median on Demographic Aging Pressure and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Near the median — 30 counties (40th–60th percentile)
Marshall County — 59th percentile — Near the median 2 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above) and Social Isolation (above); below the median on Economic Precarity, 65+, Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Livingston County — 59th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure and Social Isolation; below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Winnebago County — 58th percentile — Near the median View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure and Health, Disability & Isolation; below the median on Social Isolation.
Ogle County — 57th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Housing & Transportation, 65+ (well above); near the median on Social Isolation; below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Logan County — 57th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure and Social Isolation; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Fulton County — 56th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (above); near the median on Demographic Aging Pressure and Social Isolation; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Massac County — 55th percentile — Near the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Economic Precarity, 65+ (well above); near the median on Social Isolation; below the median on Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Perry County — 54th percentile — Near the median 2 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ ‡ (above) and Social Isolation (above); near the median on Demographic Aging Pressure; below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Tazewell County — 54th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Health, Disability & Isolation ‡ (above) and Housing & Transportation, 65+ (above); near the median on Demographic Aging Pressure; below the median on Economic Precarity, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Lee County — 53rd percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Housing & Transportation, 65+ (above) and Social Isolation (above); below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Williamson County — 53rd percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (above); near the median on Demographic Aging Pressure, Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Washington County — 53rd percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Social Isolation (above); near the median on Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+ and Health, Disability & Isolation.
‡ theme includes at least one flagged input.
Mason County — 52nd percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (above) and Social Isolation (above); below the median on Health, Disability & Isolation and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Macoupin County — 51st percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above); near the median on Economic Precarity, 65+; below the median on Health, Disability & Isolation ‡, Housing & Transportation, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Morgan County — 51st percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above); near the median on Economic Precarity, 65+ and Social Isolation; below the median on Health, Disability & Isolation ‡ and Housing & Transportation, 65+.
‡ theme includes at least one flagged input.
Coles County — 50th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure and Social Isolation; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Rock Island County — 50th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (above); near the median on Demographic Aging Pressure; below the median on Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Jasper County — 50th percentile — Near the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Social Isolation (above); near the median on Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Cumberland County — 50th percentile — Near the median 2 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Housing & Transportation, 65+ ‡ (above) and Social Isolation (above); below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Randolph County — 49th percentile — Near the median 2 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above), Economic Precarity, 65+ (above) and Social Isolation (above); below the median on Health, Disability & Isolation ‡ and Housing & Transportation, 65+.
‡ theme includes at least one flagged input.
Fayette County — 49th percentile — Near the median View by census tract →
Driven by Economic Precarity, 65+ (above) and Social Isolation (above); near the median on Demographic Aging Pressure; below the median on Health, Disability & Isolation and Housing & Transportation, 65+.
De Witt County — 48th percentile — Near the median 4 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Social Isolation (above); below the median on Economic Precarity, 65+, Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
LaSalle County — 47th percentile — Near the median 1 of 12 flagged View by census tract →
Near the median on Demographic Aging Pressure, Economic Precarity, 65+, Housing & Transportation, 65+ and Social Isolation; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Jackson County — 47th percentile — Near the median 2 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (well above) and Health, Disability & Isolation ‡ (well above); near the median on Housing & Transportation, 65+ ‡; below the median on Demographic Aging Pressure and Social Isolation.
‡ theme includes at least one flagged input.
Calhoun County — 47th percentile — Near the median 5 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (well above); near the median on Social Isolation; below the median on Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Vermilion County — 46th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Social Isolation (above); near the median on Demographic Aging Pressure and Housing & Transportation, 65+; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Sangamon County — 46th percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure, Economic Precarity, 65+ and Health, Disability & Isolation ‡; below the median on Social Isolation.
‡ theme includes at least one flagged input.
Stark County — 45th percentile — Near the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above) and Social Isolation (above); below the median on Economic Precarity, 65+, Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Monroe County — 43rd percentile — Near the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure and Health, Disability & Isolation ‡; below the median on Economic Precarity, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Cook County — 41st percentile — Near the median View by census tract →
Driven by Health, Disability & Isolation (above) and Housing & Transportation, 65+ (well above); near the median on Economic Precarity, 65+; below the median on Demographic Aging Pressure and Social Isolation.
Below the median — 14 counties (20th–40th percentile)
Greene County — 40th percentile — Below the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (well above); near the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Christian County — 39th percentile — Below the median 1 of 12 flagged View by census tract →
Near the median on Demographic Aging Pressure, Economic Precarity, 65+, Housing & Transportation, 65+ and Social Isolation; below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Piatt County — 37th percentile — Below the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above); near the median on Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+, Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Peoria County — 37th percentile — Below the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (above); below the median on Demographic Aging Pressure, Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Madison County — 36th percentile — Below the median View by census tract →
Driven by Housing & Transportation, 65+ (above); near the median on Health, Disability & Isolation; below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
Kankakee County — 35th percentile — Below the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (well above); near the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡; below the median on Demographic Aging Pressure and Social Isolation.
‡ theme includes at least one flagged input.
Mercer County — 35th percentile — Below the median 3 of 12 flagged View by census tract →
Driven by Demographic Aging Pressure (above); below the median on Economic Precarity, 65+, Health, Disability & Isolation ‡, Housing & Transportation, 65+ ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Bond County — 33rd percentile — Below the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ ‡ (well above); near the median on Demographic Aging Pressure and Social Isolation; below the median on Economic Precarity, 65+ and Health, Disability & Isolation.
‡ theme includes at least one flagged input.
St. Clair County — 31st percentile — Below the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (well above); below the median on Demographic Aging Pressure, Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Clark County — 31st percentile — Below the median 1 of 12 flagged View by census tract →
Driven by Social Isolation (above); near the median on Demographic Aging Pressure; below the median on Economic Precarity, 65+, Health, Disability & Isolation and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Lawrence County — 28th percentile — Below the median 4 of 12 flagged View by census tract →
Near the median on Demographic Aging Pressure, Economic Precarity, 65+, Health, Disability & Isolation ‡ and Social Isolation; below the median on Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Menard County — 27th percentile — Below the median 2 of 12 flagged View by census tract →
Near the median on Demographic Aging Pressure, Economic Precarity, 65+ and Housing & Transportation, 65+ ‡; below the median on Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Effingham County — 26th percentile — Below the median 2 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (above); near the median on Demographic Aging Pressure; below the median on Economic Precarity, 65+, Health, Disability & Isolation ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Woodford County — 24th percentile — Below the median 2 of 12 flagged View by census tract →
Near the median on Demographic Aging Pressure and Social Isolation; below the median on Economic Precarity, 65+, Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
Well below the median — 15 counties (0th–20th percentile)
Crawford County — 20th percentile — Well below the median 3 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ ‡ (above); near the median on Demographic Aging Pressure and Social Isolation; below the median on Economic Precarity, 65+ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
McLean County — 15th percentile — Well below the median View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (above); near the median on Health, Disability & Isolation; below the median on Demographic Aging Pressure and Social Isolation.
Jersey County — 15th percentile — Well below the median 4 of 12 flagged View by census tract →
Near the median on Demographic Aging Pressure and Economic Precarity, 65+; below the median on Health, Disability & Isolation ‡, Housing & Transportation, 65+ ‡ and Social Isolation.
‡ theme includes at least one flagged input.
Clinton County — 14th percentile — Well below the median 1 of 12 flagged View by census tract →
Near the median on Demographic Aging Pressure; below the median on Economic Precarity, 65+, Health, Disability & Isolation ‡, Housing & Transportation, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Grundy County — 13th percentile — Well below the median 1 of 12 flagged View by census tract →
Driven by Housing & Transportation, 65+ (well above); near the median on Health, Disability & Isolation ‡; below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Kane County — 13th percentile — Well below the median View by census tract →
Driven by Health, Disability & Isolation (above) and Housing & Transportation, 65+ (well above); below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
Boone County — 13th percentile — Well below the median 1 of 12 flagged View by census tract →
Driven by Health, Disability & Isolation ‡ (above); below the median on Demographic Aging Pressure, Economic Precarity, 65+, Housing & Transportation, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
DeKalb County — 12th percentile — Well below the median 1 of 12 flagged View by census tract →
Driven by Economic Precarity, 65+ (above) and Housing & Transportation, 65+ (well above); near the median on Health, Disability & Isolation ‡; below the median on Demographic Aging Pressure and Social Isolation.
‡ theme includes at least one flagged input.
Champaign County — 10th percentile — Well below the median View by census tract →
Driven by Economic Precarity, 65+ (well above); near the median on Health, Disability & Isolation and Housing & Transportation, 65+; below the median on Demographic Aging Pressure and Social Isolation.
DuPage County — 9th percentile — Well below the median View by census tract →
Near the median on Health, Disability & Isolation and Housing & Transportation, 65+; below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
Lake County — 7th percentile — Well below the median View by census tract →
Driven by Housing & Transportation, 65+ (above); near the median on Health, Disability & Isolation; below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
Will County — 6th percentile — Well below the median View by census tract →
Driven by Health, Disability & Isolation (above) and Housing & Transportation, 65+ (above); below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
McHenry County — 5th percentile — Well below the median 1 of 12 flagged View by census tract →
Near the median on Health, Disability & Isolation ‡ and Housing & Transportation, 65+; below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Kendall County — 3rd percentile — Well below the median 1 of 12 flagged View by census tract →
Driven by Health, Disability & Isolation ‡ (above); near the median on Housing & Transportation, 65+; below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Brown County — 2nd percentile — Well below the median 4 of 12 flagged View by census tract →
Below the median on Demographic Aging Pressure, Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡, Housing & Transportation, 65+ ‡ and Social Isolation.
‡ theme includes at least one flagged input.
AVI = a candidate Aging Vulnerability Index, computed by this platform from American Community Survey 2020–2024 5-year estimates, following the same method shape (percentile rank -> theme sum -> re-rank -> overall) as the CDC/ATSDR SVI this platform also recomputes — but AVI itself has no published ground truth to validate against. It is a first-cut, directional design. Percentiles rank each county against all U.S. counties.
Several of AVI's 12 input signals carry a documented high margin of error at this grain (most notably lack of health insurance, 65+) and are kept in the index with a flag rather than dropped, to preserve variable coverage. A county's flag count (shown per-county above) is a direct measure of how much its rank should be read as directional rather than precise.

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