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
- Catron County, NM — 100.0th pctile (pop. 3,743)
- De Baca County, NM — 99.9th pctile (pop. 1,576)
- Ozark County, MO — 99.8th pctile (pop. 8,873)
- Scott County, VA — 99.6th pctile (pop. 21,479)
- Harney County, OR — 99.6th pctile (pop. 7,499)
Lowest
- Martin County, TX — 0.0th pctile (pop. 5,218)
- Jim Hogg County, TX — 0.1th pctile (pop. 4,727)
- Haskell County, KS — 0.1th pctile (pop. 3,641)
- Hanson County, SD — 0.1th pctile (pop. 3,472)
- Trousdale County, TN — 0.2th pctile (pop. 11,957)
50,000-99,999
Highest
- Nye County, NV — 96.7th pctile (pop. 54,344)
- Gila County, AZ — 96.7th pctile (pop. 53,795)
- Raleigh County, WV — 96.0th pctile (pop. 73,195)
- Wilkes County, NC — 95.6th pctile (pop. 65,935)
- Pittsylvania County, VA — 94.0th pctile (pop. 59,856)
Lowest
- Oldham County, KY — 0.0th pctile (pop. 69,257)
- Eagle County, CO — 0.2th pctile (pop. 55,135)
- Lincoln County, SD — 0.5th pctile (pop. 70,638)
- Johnson County, MO — 0.9th pctile (pop. 54,732)
- Lafayette County, MS — 1.3th pctile (pop. 58,327)
100,000-299,999
Highest
- Highlands County, FL — 95.9th pctile (pop. 105,702)
- Mohave County, AZ — 93.9th pctile (pop. 220,517)
- Douglas County, OR — 93.0th pctile (pop. 112,072)
- Charlotte County, FL — 90.8th pctile (pop. 201,064)
- Indian River County, FL — 90.3th pctile (pop. 166,936)
Lowest
- Union County, NC — 0.8th pctile (pop. 250,958)
- Scott County, MN — 1.1th pctile (pop. 154,557)
- Williamson County, TN — 1.2th pctile (pop. 260,351)
- St. Mary's County, MD — 1.3th pctile (pop. 115,126)
- Dallas County, IA — 1.5th pctile (pop. 107,968)
300,000 and higher
Highest
- Pinellas County, FL — 90.1th pctile (pop. 963,481)
- Collier County, FL — 89.9th pctile (pop. 398,291)
- Marion County, FL — 87.1th pctile (pop. 400,078)
- Lee County, FL — 86.1th pctile (pop. 817,666)
- Palm Beach County, FL — 85.0th pctile (pop. 1,533,806)
Lowest
- Hamilton County, IN — 0.6th pctile (pop. 365,056)
- Prince William Count, VA — 2.1th pctile (pop. 488,880)
- Davis County, UT — 2.1th pctile (pop. 370,924)
- Douglas County, CO — 2.2th pctile (pop. 377,150)
- Loudoun County, VA — 2.4th pctile (pop. 432,998)
Chester County — Aging Vulnerability Index by county subdivision
Candidate index, not validated against ground truth — 2020–2024 ACS 5-year
Chester County — Aging Vulnerability Index by county subdivision
Where this is
Shading: Aging Vulnerability Index
Lower (2 to 11)Lower-middle (11 to 23)Middle (23 to 31)Upper-middle (34 to 54)Higher (57 to 97)
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 subdivision to see its overall percentile and theme scores.
Median county subdivision: 26th percentile (among all U.S. county subdivisions).
These county subdivisions span the 2nd percentile to the 97th percentile. The width of that range is the internal disparity.
Widest spread across these county subdivisions: Housing & Transportation, 65+ — this theme most separates the higher- and lower-ranked county subdivisions here.
AVI ranks each county subdivision'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 — 6 counties (80th–100th percentile)
East Goshen township — 97th percentile — Well above the median 3 of 12 flagged
Driven by Demographic Aging Pressure (well above), Health, Disability & Isolation ‡ (well above) and Housing & Transportation, 65+ ‡ (above); near the median on Social Isolation; below the median on Economic Precarity, 65+.
‡ theme includes at least one flagged input.
Elverson borough — 96th percentile — Well above the median 4 of 12 flagged
Driven by Demographic Aging Pressure (well above), Housing & Transportation, 65+ ‡ (well above) and Social Isolation (above); near the median on Economic Precarity, 65+ ‡ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Pennsbury township — 93rd percentile — Well above the median 6 of 12 flagged
Driven by Demographic Aging Pressure (well above), Health, Disability & Isolation ‡ (above) and Housing & Transportation, 65+ ‡ (well above); near the median on Social Isolation ‡; below the median on Economic Precarity, 65+ ‡.
‡ theme includes at least one flagged input.
Honey Brook township — 89th percentile — Well above the median 5 of 12 flagged
Driven by Demographic Aging Pressure (well above), Economic Precarity, 65+ ‡ (above), Housing & Transportation, 65+ ‡ (above) and Social Isolation ‡ (well above); below the median on Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
East Nantmeal township — 86th percentile — Well above the median 7 of 12 flagged
Driven by Demographic Aging Pressure ‡ (well above), Health, Disability & Isolation ‡ (above) and Housing & Transportation, 65+ ‡ (above); below the median on Economic Precarity, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Kennett township — 84th percentile — Well above the median 3 of 12 flagged
Driven by Demographic Aging Pressure (well above), Housing & Transportation, 65+ ‡ (well above) and Social Isolation (above); below the median on Economic Precarity, 65+ ‡ and Health, Disability & Isolation ‡.
‡ theme includes at least one flagged input.
Above the median — 8 counties (60th–80th percentile)
West Caln township — 78th percentile — Above the median 7 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (above), Health, Disability & Isolation ‡ (well above) and Housing & Transportation, 65+ ‡ (above); near the median on Demographic Aging Pressure ‡; below the median on Social Isolation ‡.
‡ theme includes at least one flagged input.
Penn township — 75th percentile — Above the median 3 of 12 flagged
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.
West Nantmeal township — 74th percentile — Above the median 7 of 12 flagged
Driven by Demographic Aging Pressure ‡ (well above) and Housing & Transportation, 65+ ‡ (well above); near the median on Health, Disability & Isolation ‡; below the median on Economic Precarity, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Malvern borough — 71st percentile — Above the median 7 of 12 flagged
Driven by Demographic Aging Pressure ‡ (above) and Health, Disability & Isolation ‡ (well above); near the median on Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
West Sadsbury township — 70th percentile — Above the median 6 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well above) and Housing & Transportation, 65+ ‡ (well above); near the median on Social Isolation; below the median on Demographic Aging Pressure ‡ and Economic Precarity, 65+ ‡.
‡ theme includes at least one flagged input.
West Brandywine township — 68th percentile — Above the median 5 of 12 flagged
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.
Warwick township — 67th percentile — Above the median 6 of 12 flagged
Driven by Demographic Aging Pressure ‡ (above) and Housing & Transportation, 65+ ‡ (above); near the median on Economic Precarity, 65+ ‡ and Health, Disability & Isolation ‡; below the median on Social Isolation ‡.
‡ theme includes at least one flagged input.
West Fallowfield township — 61st percentile — Above the median 7 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well above) and Housing & Transportation, 65+ ‡ (well above); below the median on Demographic Aging Pressure ‡, Economic Precarity, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Near the median — 10 counties (40th–60th percentile)
Parkesburg borough — 57th percentile — Near the median 6 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (well above), Health, Disability & Isolation ‡ (above), Housing & Transportation, 65+ ‡ (above) and Social Isolation ‡ (above); below the median on Demographic Aging Pressure ‡.
‡ theme includes at least one flagged input.
Oxford borough — 54th percentile — Near the median 4 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (well above) and Social Isolation ‡ (well above); near the median on Demographic Aging Pressure; below the median on Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
West Goshen township — 53rd percentile — Near the median 5 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well above) and Housing & Transportation, 65+ ‡ (above); near the median on Demographic Aging Pressure and Economic Precarity, 65+; below the median on Social Isolation ‡.
‡ theme includes at least one flagged input.
East Coventry township — 52nd percentile — Near the median 5 of 12 flagged
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.
Spring City borough — 51st percentile — Near the median 6 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (above), Housing & Transportation, 65+ ‡ (well above) and Social Isolation ‡ (above); near the median on Health, Disability & Isolation ‡; below the median on Demographic Aging Pressure ‡.
‡ theme includes at least one flagged input.
Pocopson township — 51st percentile — Near the median 5 of 12 flagged
Driven by Demographic Aging Pressure (above) and Housing & Transportation, 65+ ‡ (above); near the median on Health, Disability & Isolation ‡; below the median on Economic Precarity, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Willistown township — 49th percentile — Near the median 4 of 12 flagged
Driven by Demographic Aging Pressure (well 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.
Tredyffrin township — 44th percentile — Near the median 4 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well above) and Housing & Transportation, 65+ ‡ (above); below the median on Demographic Aging Pressure, Economic Precarity, 65+ and Social Isolation.
‡ theme includes at least one flagged input.
Sadsbury township — 41st percentile — Near the median 7 of 12 flagged
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 ‡.
‡ theme includes at least one flagged input.
West Nottingham township — 41st percentile — Near the median 7 of 12 flagged
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 ‡.
‡ theme includes at least one flagged input.
Below the median — 24 counties (20th–40th percentile)
Westtown township — 37th percentile — Below the median 6 of 12 flagged
Driven by Demographic Aging Pressure ‡ (above) and Housing & Transportation, 65+ ‡ (above); near the median on Health, Disability & Isolation ‡; below the median on Economic Precarity, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Coatesville — 37th percentile — Below the median 3 of 12 flagged
Driven by Economic Precarity, 65+ (well 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.
East Vincent township — 36th percentile — Below the median 7 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (well 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.
Uwchlan township — 36th percentile — Below the median 5 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well 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.
West Marlborough township — 36th percentile — Below the median 6 of 12 flagged
Driven by Demographic Aging Pressure ‡ (well above); near the median on Economic Precarity, 65+ ‡ and Housing & Transportation, 65+ ‡; below the median on Health, Disability & Isolation and Social Isolation ‡.
‡ theme includes at least one flagged input.
North Coventry township — 34th percentile — Below the median 5 of 12 flagged
Near the median on Demographic Aging Pressure ‡ and Health, Disability & Isolation ‡; below the median on Economic Precarity, 65+ ‡, Housing & Transportation, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
West Chester borough — 31st percentile — Below the median 1 of 12 flagged
Driven by Economic Precarity, 65+ (well 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.
Easttown township — 29th percentile — Below the median 5 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well above); near the median on Demographic Aging Pressure and Economic Precarity, 65+ ‡; below the median on Housing & Transportation, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
East Pikeland township — 28th percentile — Below the median 5 of 12 flagged
Near the median on Demographic Aging Pressure, Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Highland township — 28th percentile — Below the median 4 of 12 flagged
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.
Londonderry township — 28th percentile — Below the median 5 of 12 flagged
Driven by Health, Disability & Isolation ‡ (above); near the median on Demographic Aging Pressure ‡; below the median on Economic Precarity, 65+ ‡, Housing & Transportation, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
East Marlborough township — 27th percentile — Below the median 5 of 12 flagged
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.
New Garden township — 26th percentile — Below the median 7 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well above); near the median on Economic Precarity, 65+ ‡ and Housing & Transportation, 65+ ‡; below the median on Demographic Aging Pressure ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Honey Brook borough — 24th percentile — Below the median 5 of 12 flagged
Driven by Housing & Transportation, 65+ ‡ (well above); near the median on Health, Disability & Isolation ‡ and Social Isolation; below the median on Demographic Aging Pressure ‡ and Economic Precarity, 65+ ‡.
‡ theme includes at least one flagged input.
Upper Oxford township — 24th percentile — Below the median 7 of 12 flagged
Driven by Housing & Transportation, 65+ ‡ (above); below the median on Demographic Aging Pressure ‡, Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Atglen borough — 24th percentile — Below the median 8 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (well above) and Health, Disability & Isolation ‡ (above); near the median on Social Isolation ‡; below the median on Demographic Aging Pressure ‡ and Housing & Transportation, 65+ ‡.
‡ theme includes at least one flagged input.
East Caln township — 24th percentile — Below the median 4 of 12 flagged
Driven by Social Isolation ‡ (well above); near the median on Demographic Aging Pressure ‡ and Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+ ‡ and Health, Disability & Isolation.
‡ theme includes at least one flagged input.
Phoenixville borough — 24th percentile — Below the median 4 of 12 flagged
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.
London Grove township — 23rd percentile — Below the median 7 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well above) and Housing & Transportation, 65+ ‡ (above); below the median on Demographic Aging Pressure ‡, Economic Precarity, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Newlin township — 23rd percentile — Below the median 5 of 12 flagged
Driven by Demographic Aging Pressure ‡ (above); near the median on Health, Disability & Isolation ‡; below the median on Economic Precarity, 65+ ‡, Housing & Transportation, 65+ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Schuylkill township — 23rd percentile — Below the median 5 of 12 flagged
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 ‡.
‡ theme includes at least one flagged input.
West Grove borough — 22nd percentile — Below the median 7 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (well above) and Health, Disability & Isolation ‡ (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.
Valley township — 21st percentile — Below the median 7 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (well 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.
Lower Oxford township — 20th percentile — Below the median 7 of 12 flagged
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.
Well below the median — 25 counties (0th–20th percentile)
West Whiteland township — 20th percentile — Well below the median 6 of 12 flagged
Driven by Health, Disability & Isolation ‡ (well 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.
Modena borough — 19th percentile — Well below the median 8 of 12 flagged
Driven by Economic Precarity, 65+ ‡ (above) and Housing & Transportation, 65+ ‡ (well above); near the median on Social Isolation ‡; below the median on Demographic Aging Pressure ‡ and Health, Disability & Isolation.
‡ theme includes at least one flagged input.
Wallace township — 18th percentile — Well below the median 7 of 12 flagged
Near the median on Demographic Aging Pressure ‡ and Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Caln township — 17th percentile — Well below the median 4 of 12 flagged
Driven by Housing & Transportation, 65+ ‡ (well above); below the median on Demographic Aging Pressure, Economic Precarity, 65+ ‡, Health, Disability & Isolation and Social Isolation ‡.
‡ theme includes at least one flagged input.
South Coventry township — 17th percentile — Well below the median 4 of 12 flagged
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.
East Whiteland township — 17th percentile — Well below the median 6 of 12 flagged
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.
East Bradford township — 16th percentile — Well below the median 6 of 12 flagged
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.
London Britain township — 15th percentile — Well below the median 6 of 12 flagged
Driven by Housing & Transportation, 65+ ‡ (above); below the median on Demographic Aging Pressure ‡, Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Kennett Square borough — 14th percentile — Well below the median 5 of 12 flagged
Near the median on Economic Precarity, 65+ ‡ and Health, Disability & Isolation ‡; below the median on Demographic Aging Pressure, Housing & Transportation, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Birmingham township — 12th percentile — Well below the median 5 of 12 flagged
Near the median on Demographic Aging Pressure ‡ and Housing & Transportation, 65+ ‡; below the median on Economic Precarity, 65+ ‡, Health, Disability & Isolation and Social Isolation ‡.
‡ theme includes at least one flagged input.
West Bradford township — 11th percentile — Well below the median 4 of 12 flagged
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 ‡.
‡ theme includes at least one flagged input.
Upper Uwchlan township — 11th percentile — Well below the median 6 of 12 flagged
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 ‡.
‡ theme includes at least one flagged input.
Downingtown borough — 11th percentile — Well below the median 7 of 12 flagged
Driven by Housing & Transportation, 65+ ‡ (above); below the median on Demographic Aging Pressure ‡, Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
East Brandywine township — 10th percentile — Well below the median 5 of 12 flagged
Driven by Housing & Transportation, 65+ ‡ (above); below the median on Demographic Aging Pressure, Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Franklin township — 9th percentile — Well below the median 3 of 12 flagged
Near the median on Housing & Transportation, 65+ ‡; below the median on Demographic Aging Pressure ‡, Economic Precarity, 65+ ‡, Health, Disability & Isolation and Social Isolation.
‡ theme includes at least one flagged input.
West Vincent township — 9th percentile — Well below the median 8 of 12 flagged
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 ‡.
‡ theme includes at least one flagged input.
Elk township — 8th percentile — Well below the median 7 of 12 flagged
Near the median on Housing & Transportation, 65+ ‡; below the median on Demographic Aging Pressure ‡, Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
East Nottingham township — 8th percentile — Well below the median 5 of 12 flagged
Driven by Housing & Transportation, 65+ ‡ (above); below the median on Demographic Aging Pressure ‡, Economic Precarity, 65+ ‡, Health, Disability & Isolation and Social Isolation ‡.
‡ theme includes at least one flagged input.
South Coatesville borough — 7th percentile — Well below the median 6 of 12 flagged
Near the median on Economic Precarity, 65+ ‡, Health, Disability & Isolation ‡ and Housing & Transportation, 65+ ‡; below the median on Demographic Aging Pressure ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
Avondale borough — 7th percentile — Well below the median 8 of 12 flagged
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.
Thornbury township — 6th percentile — Well below the median 5 of 12 flagged
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.
East Fallowfield township — 5th percentile — Well below the median 5 of 12 flagged
Near the median on Economic Precarity, 65+ ‡; below the median on Demographic Aging Pressure ‡, Health, Disability & Isolation, Housing & Transportation, 65+ ‡ and Social Isolation ‡.
‡ theme includes at least one flagged input.
West Pikeland township — 5th percentile — Well below the median 5 of 12 flagged
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.
Charlestown township — 3rd percentile — Well below the median 6 of 12 flagged
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.
New London township — 2nd percentile — Well below the median 4 of 12 flagged
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. county subdivisions.
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.