Piatt 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 16.66K Piatt County, IL population, 5.03K had Unclassified ancestry (30.18%), 4.18K had German ancestry (25.07%), and 2.42K had Irish ancestry (14.55%).
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.
Piatt County, IL Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Unclassified | 5029 | 30.18 |
| German | 4177 | 25.07 |
| Irish | 2425 | 14.55 |
| English | 2417 | 14.50 |
| Other Groups | 1995 | 11.97 |
| American | 889 | 5.34 |
| Scottish | 462 | 2.77 |
| Polish | 409 | 2.45 |
| Italian | 394 | 2.36 |
| Swedish | 297 | 1.78 |
| European | 285 | 1.71 |
| French (except Basque) | 276 | 1.66 |
| Norwegian | 231 | 1.39 |
| British | 229 | 1.37 |
| Dutch | 210 | 1.26 |
| Scotch Irish | 192 | 1.15 |
| Welsh | 183 | 1.10 |
| Hungarian | 165 | 0.99 |
| Czech | 108 | 0.65 |
| Russian | 92 | 0.55 |
| Greek | 88 | 0.53 |
| Austrian | 59 | 0.35 |
| Belgian | 57 | 0.34 |
| Portuguese | 57 | 0.34 |
| Canadian | 53 | 0.32 |
| Swiss | 53 | 0.32 |
| Brazilian | 43 | 0.26 |
| Slovak | 35 | 0.21 |
| Eastern European | 31 | 0.19 |
| French Canadian | 27 | 0.16 |
| Lebanese | 20 | 0.12 |
| Alsatian | 17 | 0.10 |
| Czechoslovakian | 17 | 0.10 |
| Finnish | 17 | 0.10 |
| Northern European | 17 | 0.10 |
| Scandinavian | 17 | 0.10 |
| Egyptian | 8 | 0.05 |
| Croatian | 7 | 0.04 |
| Pennsylvania German | 7 | 0.04 |
| Danish | 5 | 0.03 |
| Lithuanian | 4 | 0.02 |
| Slovene | 4 | 0.02 |
| Luxembourger | 3 | 0.02 |
| West Indian (except Hispanic groups) | 3 | 0.02 |
| West Indian | 3 | 0.02 |