Social Vulnerability Index Recalculation

The Social Vulnerability Index Recalculation is based on the important work of the federal Centers for Disease Control. With the future of that index in doubt, the same federal datasets and methodologies were used to carry the index forward.

The most recent SVI uses the 2022 American Communities Survey as its base. This recalculation matches the 2022 baseline 100 percent. The 2022 methodologies form the basis of the updated calculations for subsequent ACS vintages. This platform will run updates on all new ACS releases.

Should the SVI be updated with changed methodologies, this platform will update to match, while preserving the 2022 methodologies for comparison purposes.

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Winnebago County — Social Vulnerability Index

Unofficial CDC-method recomputation, 2020–2024 ACS 5-year
Winnebago County — Social Vulnerability Index by census tract
Tract 1.01 — 29 (Lower-middle)Tract 1.03 — 49 (Lower-middle)Tract 1.04 — 52 (Middle)Tract 1.05 — 69 (Middle)Tract 2.00 — 62 (Middle)Tract 3.00 — 44 (Lower-middle)Tract 4.01 — 34 (Lower-middle)Tract 4.02 — 46 (Lower-middle)Tract 4.03 — 64 (Middle)Tract 5.01 — 57 (Middle)Tract 5.02 — 93 (Higher)Tract 5.06 — 27 (Lower)Tract 5.07 — 76 (Upper-middle)Tract 5.10 — 24 (Lower)Tract 5.11 — 30 (Lower-middle)Tract 5.12 — 64 (Middle)Tract 5.13 — 61 (Middle)Tract 5.14 — 28 (Lower-middle)Tract 5.15 — 53 (Middle)Tract 5.16 — 26 (Lower)Tract 6.00 — 51 (Lower-middle)Tract 7.00 — 41 (Lower-middle)Tract 8.00 — 83 (Upper-middle)Tract 10.00 — 95 (Higher)Tract 11.00 — 99 (Higher)Tract 12.00 — 99 (Higher)Tract 13.00 — 90 (Higher)Tract 14.00 — 74 (Upper-middle)Tract 15.00 — 93 (Higher)Tract 16.00 — 77 (Upper-middle)Tract 17.00 — 69 (Middle)Tract 18.00 — 96 (Higher)Tract 19.00 — 94 (Higher)Tract 20.00 — 76 (Upper-middle)Tract 21.00 — 78 (Upper-middle)Tract 22.00 — 81 (Upper-middle)Tract 23.01 — 89 (Higher)Tract 23.02 — 55 (Middle)Tract 24.00 — 88 (Upper-middle)Tract 25.00 — 99 (Higher)Tract 26.00 — 99 (Higher)Tract 27.00 — 87 (Upper-middle)Tract 28.00 — 81 (Upper-middle)Tract 29.00 — 90 (Higher)Tract 30.00 — 27 (Lower)Tract 31.00 — 88 (Higher)Tract 32.00 — 83 (Upper-middle)Tract 33.00 — 94 (Higher)Tract 34.00 — 74 (Upper-middle)Tract 35.00 — 25 (Lower)Tract 36.01 — 28 (Lower-middle)Tract 36.02 — 94 (Higher)Tract 36.04 — 88 (Upper-middle)Tract 36.05 — 86 (Upper-middle)Tract 36.06 — 80 (Upper-middle)Tract 37.05 — 41 (Lower-middle)Tract 37.06 — 42 (Lower-middle)Tract 37.07 — 54 (Middle)Tract 37.08 — 60 (Middle)Tract 37.09 — 99 (Higher)Tract 37.10 — 54 (Middle)Tract 37.11 — 38 (Lower-middle)Tract 38.01 — 25 (Lower)Tract 38.05 — 54 (Middle)Tract 38.06 — 11 (Lower)Tract 38.08 — 28 (Lower-middle)Tract 38.09 — 82 (Upper-middle)Tract 38.10 — 30 (Lower-middle)Tract 38.11 — 6 (Lower)Tract 39.01 — 10 (Lower)Tract 39.03 — 4 (Lower)Tract 39.04 — 20 (Lower)Tract 40.02 — 21 (Lower)Tract 40.03 — 61 (Middle)Tract 40.04 — 56 (Middle)Tract 40.05 — 3 (Lower)Tract 41.00 — 39 (Lower-middle)Tract 42.00 — 22 (Lower)Tract 43.00 — 18 (Lower)Tract 9800.00 — no data (unmeasured)
Where this is
Shading: Overall SVI Percentile
Lower (3 to 27)Lower-middle (28 to 51)Middle (52 to 69)Upper-middle (74 to 88)Higher (88 to 99)No data
Each unit is shaded by its Overall SVI Percentile 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 tract to see its overall percentile and theme scores.

Median tract: 60th percentile (among tracts in IL).
These tracts span the 3rd percentile to the 99th percentile. The width of that range is the internal disparity.
Well above the median26 (33%) · 74,134 people
Above the median13 (16%) · 46,810 people
Near the median16 (20%) · 63,309 people
Below the median17 (22%) · 67,986 people
Well below the median7 (9%) · 31,048 people
Widest spread across these tracts: Housing Type & Transportation — this theme most separates the higher- and lower-ranked tracts here.
The SVI ranks each tract'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 — 26 tracts (80th–100th percentile)
Tract 11.00 (pop. 1,303) — 99th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (well above).
Tract 12.00 (pop. 2,776) — 99th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above), Racial & Ethnic Minority Status (well above) and Housing Type & Transportation (well above).
Tract 26.00 (pop. 3,209) — 99th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (above), Racial & Ethnic Minority Status (well above) and Housing Type & Transportation (well above).
Tract 25.00 (pop. 2,695) — 99th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above), Racial & Ethnic Minority Status (well above) and Housing Type & Transportation (above).
Tract 37.09 (pop. 1,888) — 99th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (well above).
Tract 18.00 (pop. 4,689) — 96th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above).
Tract 10.00 (pop. 2,202) — 95th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (well above).
Tract 36.02 (pop. 3,533) — 94th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Housing Type & Transportation (above); near the median on Racial & Ethnic Minority Status.
Tract 19.00 (pop. 3,284) — 94th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above).
Tract 33.00 (pop. 4,102) — 94th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Racial & Ethnic Minority Status (above); near the median on Housing Type & Transportation.
Tract 15.00 (pop. 5,468) — 93rd percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above).
Tract 5.02 (pop. 4,020) — 93rd percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (above), Household Characteristics (well above) and Housing Type & Transportation (well above); near the median on Racial & Ethnic Minority Status.
Tract 13.00 (pop. 1,874) — 90th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Housing Type & Transportation (above); near the median on Racial & Ethnic Minority Status.
Tract 29.00 (pop. 1,325) — 90th percentile — Well above the median CDC-based flag ≥ 90th percentile
Driven by Socioeconomic Status (well above), Household Characteristics (above) and Housing Type & Transportation (well above); near the median on Racial & Ethnic Minority Status.
Tract 23.01 (pop. 2,287) — 89th percentile — Well above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above).
Tract 31.00 (pop. 3,118) — 88th percentile — Well above the median
Driven by Socioeconomic Status (well above), Household Characteristics (above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above).
Tract 36.04 (pop. 2,865) — 88th percentile — Well above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Racial & Ethnic Minority Status (above); below the median on Housing Type & Transportation.
Tract 24.00 (pop. 2,409) — 88th percentile — Well above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Racial & Ethnic Minority Status (well above); below the median on Housing Type & Transportation.
Tract 27.00 (pop. 2,495) — 87th percentile — Well above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Racial & Ethnic Minority Status (well above); near the median on Housing Type & Transportation.
Tract 36.05 (pop. 1,928) — 86th percentile — Well above the median
Driven by Socioeconomic Status (above), Household Characteristics (well above) and Housing Type & Transportation (above); near the median on Racial & Ethnic Minority Status.
Tract 32.00 (pop. 2,329) — 83rd percentile — Well above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Racial & Ethnic Minority Status (well above); below the median on Housing Type & Transportation.
Tract 8.00 (pop. 2,839) — 83rd percentile — Well above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Racial & Ethnic Minority Status (above); below the median on Housing Type & Transportation.
Tract 38.09 (pop. 4,648) — 82nd percentile — Well above the median
Driven by Socioeconomic Status (above), Household Characteristics (above) and Housing Type & Transportation (well above); near the median on Racial & Ethnic Minority Status.
Tract 28.00 (pop. 1,371) — 81st percentile — Well above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Racial & Ethnic Minority Status (well above); below the median on Housing Type & Transportation.
Tract 22.00 (pop. 2,815) — 81st percentile — Well above the median
Driven by Socioeconomic Status (above), Household Characteristics (well above) and Racial & Ethnic Minority Status (above); near the median on Housing Type & Transportation.
Tract 36.06 (pop. 2,662) — 80th percentile — Well above the median
Driven by Socioeconomic Status (well above) and Household Characteristics (well above); near the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Above the median — 13 tracts (60th–80th percentile)
Tract 21.00 (pop. 1,928) — 78th percentile — Above the median
Driven by Socioeconomic Status (well above), Household Characteristics (well above) and Racial & Ethnic Minority Status (above); below the median on Housing Type & Transportation.
Tract 16.00 (pop. 5,534) — 77th percentile — Above the median
Driven by Socioeconomic Status (above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above).
Tract 20.00 (pop. 1,697) — 76th percentile — Above the median
Driven by Socioeconomic Status (well above), Household Characteristics (above) and Racial & Ethnic Minority Status (above); below the median on Housing Type & Transportation.
Tract 5.07 (pop. 3,660) — 76th percentile — Above the median
Driven by Socioeconomic Status (above), Household Characteristics (well above) and Housing Type & Transportation (above); near the median on Racial & Ethnic Minority Status.
Tract 14.00 (pop. 4,024) — 74th percentile — Above the median
Driven by Socioeconomic Status (above) and Household Characteristics (well above); near the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 34.00 (pop. 4,754) — 74th percentile — Above the median
Driven by Socioeconomic Status (above), Household Characteristics (well above), Racial & Ethnic Minority Status (above) and Housing Type & Transportation (above).
Tract 1.05 (pop. 3,877) — 69th percentile — Above the median
Driven by Socioeconomic Status (above) and Household Characteristics (well above); near the median on Housing Type & Transportation; below the median on Racial & Ethnic Minority Status.
Tract 17.00 (pop. 2,851) — 69th percentile — Above the median
Driven by Socioeconomic Status (well above) and Racial & Ethnic Minority Status (above); near the median on Household Characteristics; below the median on Housing Type & Transportation.
Tract 4.03 (pop. 4,361) — 64th percentile — Above the median
Driven by Household Characteristics (well above) and Housing Type & Transportation (well above); near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status.
Tract 5.12 (pop. 4,547) — 64th percentile — Above the median
Driven by Housing Type & Transportation (well above); near the median on Socioeconomic Status and Household Characteristics; below the median on Racial & Ethnic Minority Status.
Tract 2.00 (pop. 3,468) — 62nd percentile — Above the median
Driven by Socioeconomic Status (above); near the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 40.03 (pop. 2,081) — 61st percentile — Above the median
Driven by Socioeconomic Status (above); near the median on Racial & Ethnic Minority Status and Housing Type & Transportation; below the median on Household Characteristics.
Tract 5.13 (pop. 4,028) — 61st percentile — Above the median
Driven by Household Characteristics (above) and Housing Type & Transportation (above); near the median on Socioeconomic Status; below the median on Racial & Ethnic Minority Status.
Near the median — 16 tracts (40th–60th percentile)
Tract 37.08 (pop. 3,593) — 60th percentile — Near the median
Driven by Socioeconomic Status (above), Household Characteristics (above) and Racial & Ethnic Minority Status (above); below the median on Housing Type & Transportation.
Tract 5.01 (pop. 5,350) — 57th percentile — Near the median
Driven by Household Characteristics (well above); near the median on Socioeconomic Status and Racial & Ethnic Minority Status; below the median on Housing Type & Transportation.
Tract 40.04 (pop. 6,157) — 56th percentile — Near the median
Driven by Housing Type & Transportation (above); near the median on Socioeconomic Status and Household Characteristics; below the median on Racial & Ethnic Minority Status.
Tract 23.02 (pop. 1,349) — 55th percentile — Near the median
Driven by Socioeconomic Status (above) and Household Characteristics (well above); below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 37.07 (pop. 3,596) — 54th percentile — Near the median
Driven by Socioeconomic Status (above); near the median on Racial & Ethnic Minority Status and Housing Type & Transportation; below the median on Household Characteristics.
Tract 38.05 (pop. 6,985) — 54th percentile — Near the median
Driven by Household Characteristics (above); near the median on Socioeconomic Status and Housing Type & Transportation; below the median on Racial & Ethnic Minority Status.
Tract 37.10 (pop. 2,780) — 54th percentile — Near the median
Driven by Racial & Ethnic Minority Status (above); near the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 5.15 (pop. 2,691) — 53rd percentile — Near the median
Driven by Household Characteristics (above) and Racial & Ethnic Minority Status (above); near the median on Socioeconomic Status and Housing Type & Transportation.
Tract 1.04 (pop. 2,788) — 52nd percentile — Near the median
Driven by Socioeconomic Status (well above); near the median on Household Characteristics; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 6.00 (pop. 4,697) — 51st percentile — Near the median
Driven by Socioeconomic Status (above) and Household Characteristics (above); near the median on Racial & Ethnic Minority Status; below the median on Housing Type & Transportation.
Tract 1.03 (pop. 2,669) — 49th percentile — Near the median
Driven by Socioeconomic Status (above) and Household Characteristics (above); below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 4.02 (pop. 2,838) — 46th percentile — Near the median
Driven by Household Characteristics (well above); near the median on Housing Type & Transportation; below the median on Socioeconomic Status and Racial & Ethnic Minority Status.
Tract 3.00 (pop. 4,141) — 44th percentile — Near the median
Driven by Socioeconomic Status (above); near the median on Racial & Ethnic Minority Status; below the median on Household Characteristics and Housing Type & Transportation.
Tract 37.06 (pop. 5,901) — 42nd percentile — Near the median
Driven by Household Characteristics (above) and Racial & Ethnic Minority Status (above); near the median on Socioeconomic Status; below the median on Housing Type & Transportation.
Tract 7.00 (pop. 2,955) — 41st percentile — Near the median
Driven by Socioeconomic Status (above); near the median on Household Characteristics; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 37.05 (pop. 4,819) — 41st percentile — Near the median
Driven by Household Characteristics (well above); below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Below the median — 17 tracts (20th–40th percentile)
Tract 41.00 (pop. 5,203) — 39th percentile — Below the median
Driven by Housing Type & Transportation (above); below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 37.11 (pop. 3,661) — 38th percentile — Below the median
Driven by Socioeconomic Status (above); below the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 4.01 (pop. 2,230) — 34th percentile — Below the median
Near the median on Housing Type & Transportation; below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 5.11 (pop. 2,409) — 30th percentile — Below the median
Near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 38.10 (pop. 5,621) — 30th percentile — Below the median
Near the median on Socioeconomic Status and Household Characteristics; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 1.01 (pop. 4,359) — 29th percentile — Below the median
Near the median on Socioeconomic Status; below the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 36.01 (pop. 1,824) — 28th percentile — Below the median
Driven by Housing Type & Transportation (above); below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 38.08 (pop. 4,002) — 28th percentile — Below the median
Near the median on Housing Type & Transportation; below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Tract 5.14 (pop. 3,747) — 28th percentile — Below the median
Near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 30.00 (pop. 1,635) — 27th percentile — Below the median
Near the median on Socioeconomic Status; below the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 5.06 (pop. 4,856) — 27th percentile — Below the median
Near the median on Household Characteristics and Racial & Ethnic Minority Status; below the median on Socioeconomic Status and Housing Type & Transportation.
Tract 5.16 (pop. 3,823) — 26th percentile — Below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 35.00 (pop. 2,547) — 25th percentile — Below the median
Near the median on Socioeconomic Status and Household Characteristics; below the median on Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 38.01 (pop. 6,767) — 25th percentile — Below the median
Driven by Household Characteristics (above); below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 5.10 (pop. 3,495) — 24th percentile — Below the median
Near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 42.00 (pop. 5,906) — 22nd percentile — Below the median
Driven by Household Characteristics (above); below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 40.02 (pop. 5,901) — 21st percentile — Below the median
Near the median on Housing Type & Transportation; below the median on Socioeconomic Status, Household Characteristics and Racial & Ethnic Minority Status.
Well below the median — 7 tracts (0th–20th percentile)
Tract 39.04 (pop. 4,638) — 20th percentile — Well below the median
Near the median on Socioeconomic Status; below the median on Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 43.00 (pop. 5,024) — 18th percentile — Well below the median
Near the median on Household Characteristics; below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 38.06 (pop. 5,549) — 11th percentile — Well below the median
Below the median on Socioeconomic Status, Household Characteristics, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 39.01 (pop. 5,132) — 10th percentile — Well below the median
Near the median on Household Characteristics; below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 38.11 (pop. 1,519) — 6th percentile — Well below the median
Near the median on Racial & Ethnic Minority Status; below the median on Socioeconomic Status, Household Characteristics and Housing Type & Transportation.
Tract 39.03 (pop. 5,849) — 4th percentile — Well below the median
Driven by Household Characteristics (above); below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
Tract 40.05 (pop. 3,337) — 3rd percentile — Well below the median
Near the median on Household Characteristics; below the median on Socioeconomic Status, Racial & Ethnic Minority Status and Housing Type & Transportation.
1 tract unranked — no population or suppressed
These carry no percentile (zero-population or suppressed data, typically water and special-use tracts). They are excluded from the bands, median and range above, and are never shown as a low score.
SVI = the CDC/ATSDR Social Vulnerability Index, recomputed by this platform from American Community Survey 2020–2024 5-year estimates using CDC's published method. Percentiles rank each tract against tracts in IL. "Vulnerability" is the name of CDC's index; the platform reports where a place ranks on it, and does not grade places or their residents.
Top-decile flags follow CDC's own convention (≥ 90th percentile) and are attributed as such; they are not part of an official CDC distribution.

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