Knox 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 50.19K Knox County, IL population, 16.59K had Unclassified ancestry (33.05%), 9.52K had Other Groups ancestry (18.97%), and 8.46K had German ancestry (16.86%).
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.
Knox County, IL Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Unclassified | 16588 | 33.05 |
| Other Groups | 9520 | 18.97 |
| German | 8464 | 16.86 |
| Irish | 6900 | 13.75 |
| English | 5085 | 10.13 |
| Swedish | 3530 | 7.03 |
| American | 3142 | 6.26 |
| Italian | 1074 | 2.14 |
| Scottish | 830 | 1.65 |
| Subsaharan African | 757 | 1.51 |
| European | 751 | 1.50 |
| Scotch Irish | 725 | 1.44 |
| Polish | 600 | 1.20 |
| Dutch | 597 | 1.19 |
| African | 597 | 1.19 |
| French (except Basque) | 577 | 1.15 |
| Norwegian | 400 | 0.80 |
| Welsh | 229 | 0.46 |
| British | 186 | 0.37 |
| Scandinavian | 142 | 0.28 |
| Belgian | 121 | 0.24 |
| Czech | 105 | 0.21 |
| Swiss | 104 | 0.21 |
| Greek | 103 | 0.21 |
| Croatian | 83 | 0.17 |
| Danish | 81 | 0.16 |
| Hungarian | 75 | 0.15 |
| Northern European | 75 | 0.15 |
| Austrian | 66 | 0.13 |
| French Canadian | 59 | 0.12 |
| Eastern European | 56 | 0.11 |
| Pennsylvania German | 54 | 0.11 |
| Armenian | 53 | 0.11 |
| Russian | 39 | 0.08 |
| Lithuanian | 37 | 0.07 |
| Luxembourger | 32 | 0.06 |
| Portuguese | 31 | 0.06 |
| Yugoslavian | 31 | 0.06 |
| Australian | 30 | 0.06 |
| Ukrainian | 26 | 0.05 |
| Ethiopian | 25 | 0.05 |
| Iranian | 16 | 0.03 |
| Czechoslovakian | 15 | 0.03 |
| Ghanaian | 14 | 0.03 |
| Canadian | 12 | 0.02 |
| German Russian | 11 | 0.02 |
| Serbian | 11 | 0.02 |
| Slovak | 8 | 0.02 |
| Nigerian | 6 | 0.01 |
| Arab | 4 | 0.01 |
| Romanian | 3 | 0.01 |
| Slovene | 3 | 0.01 |
| Cajun | 2 | 0.00 |
| Icelander | 2 | 0.00 |
| Finnish | 1 | 0.00 |