Winnebago 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 285.47K Winnebago County, IL population, 84.35K had Other Groups ancestry (29.55%), 61.15K had German ancestry (21.42%), and 57.86K had Unclassified ancestry (20.27%).
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.
Winnebago County, IL Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Other Groups | 84348 | 29.55 |
| German | 61151 | 21.42 |
| Unclassified | 57864 | 20.27 |
| Irish | 32456 | 11.37 |
| English | 22626 | 7.93 |
| Swedish | 21201 | 7.43 |
| Italian | 19749 | 6.92 |
| Polish | 10324 | 3.62 |
| American | 8478 | 2.97 |
| Norwegian | 8392 | 2.94 |
| French (except Basque) | 4219 | 1.48 |
| Scottish | 4055 | 1.42 |
| European | 3721 | 1.30 |
| Dutch | 3674 | 1.29 |
| Subsaharan African | 3132 | 1.10 |
| Scotch Irish | 1647 | 0.58 |
| African | 1599 | 0.56 |
| British | 1535 | 0.54 |
| Danish | 1499 | 0.53 |
| Russian | 1368 | 0.48 |
| Welsh | 1268 | 0.44 |
| Czech | 1174 | 0.41 |
| Swiss | 1147 | 0.40 |
| Scandinavian | 1006 | 0.35 |
| Lithuanian | 969 | 0.34 |
| French Canadian | 836 | 0.29 |
| Greek | 795 | 0.28 |
| West Indian (except Hispanic groups) | 786 | 0.28 |
| Iraqi | 778 | 0.27 |
| Finnish | 637 | 0.22 |
| Nigerian | 580 | 0.20 |
| Arab | 551 | 0.19 |
| Jamaican | 487 | 0.17 |
| Eastern European | 472 | 0.17 |
| Belgian | 456 | 0.16 |
| Serbian | 403 | 0.14 |
| Egyptian | 386 | 0.14 |
| Albania | 354 | 0.12 |
| Northern European | 354 | 0.12 |
| Hungarian | 320 | 0.11 |
| Yugoslavian | 313 | 0.11 |
| Slovak | 309 | 0.11 |
| Jordanian | 304 | 0.11 |
| Barbadian | 296 | 0.10 |
| Ukrainian | 286 | 0.10 |
| Croatian | 269 | 0.09 |
| South African | 266 | 0.09 |
| Austrian | 249 | 0.09 |
| Lebanese | 198 | 0.07 |
| Kenyan | 196 | 0.07 |
| Haitian | 180 | 0.06 |
| Romanian | 178 | 0.06 |
| Slovene | 152 | 0.05 |
| Brazilian | 149 | 0.05 |
| Canadian | 137 | 0.05 |
| Pennsylvania German | 137 | 0.05 |
| Czechoslovakian | 135 | 0.05 |
| Armenian | 131 | 0.05 |
| Ethiopian | 82 | 0.03 |
| Turkish | 74 | 0.03 |
| Portuguese | 69 | 0.02 |
| Iranian | 64 | 0.02 |
| Cajun | 63 | 0.02 |
| Latvian | 61 | 0.02 |
| Ghanaian | 60 | 0.02 |
| Slavic | 59 | 0.02 |
| Celtic | 50 | 0.02 |
| Moroccan | 47 | 0.02 |
| Bulgarian | 42 | 0.02 |
| Alsatian | 38 | 0.01 |
| Cypriot | 34 | 0.01 |
| Trinidadian and Tobagonian | 30 | 0.01 |
| New Zealander | 23 | 0.01 |
| Luxembourger | 21 | 0.01 |
| Syrian | 19 | 0.01 |
| Belizean | 12 | 0.00 |
| Icelander | 9 | 0.00 |
| Israeli | 9 | 0.00 |
| Palestinian | 7 | 0.00 |
| Australian | 7 | 0.00 |