Marion 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 37.78K Marion County, IL population, 13.34K had Unclassified ancestry (35.30%), 8.63K had German ancestry (22.85%), and 6.30K had Other Groups ancestry (16.68%).
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.
Marion County, IL Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Unclassified | 13337 | 35.30 |
| German | 8634 | 22.85 |
| Other Groups | 6300 | 16.68 |
| Irish | 4495 | 11.90 |
| English | 3944 | 10.44 |
| American | 3062 | 8.11 |
| Polish | 978 | 2.59 |
| Italian | 759 | 2.01 |
| European | 588 | 1.56 |
| French (except Basque) | 576 | 1.53 |
| Dutch | 527 | 1.40 |
| Scottish | 478 | 1.26 |
| Scotch Irish | 402 | 1.06 |
| British | 208 | 0.55 |
| Swedish | 160 | 0.42 |
| Lithuanian | 153 | 0.41 |
| Welsh | 144 | 0.38 |
| Czech | 99 | 0.26 |
| Hungarian | 83 | 0.22 |
| Norwegian | 83 | 0.22 |
| Scandinavian | 78 | 0.21 |
| Russian | 55 | 0.15 |
| Northern European | 51 | 0.14 |
| Greek | 44 | 0.12 |
| Czechoslovakian | 34 | 0.09 |
| Croatian | 33 | 0.09 |
| Danish | 33 | 0.09 |
| Austrian | 31 | 0.08 |
| Swiss | 28 | 0.07 |
| Canadian | 19 | 0.05 |
| French Canadian | 13 | 0.03 |
| Subsaharan African | 12 | 0.03 |
| Iraqi | 11 | 0.03 |
| Slovak | 11 | 0.03 |
| West Indian (except Hispanic groups) | 11 | 0.03 |
| Jamaican | 11 | 0.03 |
| Egyptian | 10 | 0.03 |
| African | 10 | 0.03 |
| Albania | 9 | 0.02 |
| Bulgarian | 8 | 0.02 |
| Eastern European | 8 | 0.02 |
| Arab | 5 | 0.01 |
| Portuguese | 5 | 0.01 |
| Lebanese | 3 | 0.01 |
| Finnish | 3 | 0.01 |
| Kenyan | 2 | 0.01 |