Jefferson County, IL Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 37.36K Jefferson County, IL population, 13.80K had Unclassified ancestry (36.92%), 7.48K had Other Groups ancestry (20.02%), and 6.61K had German ancestry (17.69%).
The chart below shows the top 10 ancestry groups by percentage, and the table below shows both the population and percentages for many ancestry groups.
You can see similar information for other Illinois counties, and for Illinois.
NB: People could belong to one or more ancestry groups.
Data Source: US Census Bureau.
Jefferson County, IL Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Unclassified | 13795 | 36.92 |
| Other Groups | 7480 | 20.02 |
| German | 6608 | 17.69 |
| English | 4154 | 11.12 |
| Irish | 4068 | 10.89 |
| American | 2350 | 6.29 |
| Polish | 889 | 2.38 |
| French (except Basque) | 707 | 1.89 |
| Italian | 614 | 1.64 |
| Scottish | 578 | 1.55 |
| European | 480 | 1.29 |
| Dutch | 443 | 1.19 |
| Scotch Irish | 336 | 0.90 |
| Swedish | 304 | 0.81 |
| Scandinavian | 233 | 0.62 |
| British | 228 | 0.61 |
| Welsh | 222 | 0.59 |
| Norwegian | 132 | 0.35 |
| Swiss | 126 | 0.34 |
| Czech | 101 | 0.27 |
| Pennsylvania German | 86 | 0.23 |
| Subsaharan African | 85 | 0.23 |
| African | 82 | 0.22 |
| Danish | 58 | 0.16 |
| French Canadian | 57 | 0.15 |
| Lithuanian | 55 | 0.15 |
| Russian | 53 | 0.14 |
| Slovak | 44 | 0.12 |
| West Indian (except Hispanic groups) | 43 | 0.12 |
| Croatian | 39 | 0.10 |
| Haitian | 24 | 0.06 |
| Bulgarian | 21 | 0.06 |
| Canadian | 19 | 0.05 |
| Eastern European | 19 | 0.05 |
| Hungarian | 17 | 0.05 |
| Northern European | 17 | 0.05 |
| Bahamian | 17 | 0.05 |
| Lebanese | 12 | 0.03 |
| Austrian | 12 | 0.03 |
| Finnish | 10 | 0.03 |
| Portuguese | 10 | 0.03 |
| Belgian | 9 | 0.02 |
| Turkish | 8 | 0.02 |
| Armenian | 7 | 0.02 |
| Romanian | 5 | 0.01 |
| Egyptian | 4 | 0.01 |
| Australian | 3 | 0.01 |
| Greek | 3 | 0.01 |
| Cape Verdean | 3 | 0.01 |
| Slovene | 2 | 0.01 |
| Jamaican | 2 | 0.01 |
| Czechoslovakian | 1 | 0.00 |