Rock Island 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 144.69K Rock Island County, IL population, 43.48K had Unclassified ancestry (30.05%), 35.69K had Other Groups ancestry (24.66%), and 29.97K had German ancestry (20.71%).
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.
Rock Island County, IL Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| Unclassified | 43478 | 30.05 |
| Other Groups | 35685 | 24.66 |
| German | 29968 | 20.71 |
| Irish | 16758 | 11.58 |
| English | 10452 | 7.22 |
| Swedish | 7127 | 4.93 |
| American | 4623 | 3.20 |
| Belgian | 4559 | 3.15 |
| Italian | 3875 | 2.68 |
| Subsaharan African | 3466 | 2.40 |
| Polish | 2831 | 1.96 |
| French (except Basque) | 2694 | 1.86 |
| African | 2657 | 1.84 |
| Dutch | 2270 | 1.57 |
| Norwegian | 2141 | 1.48 |
| European | 1885 | 1.30 |
| Scottish | 1618 | 1.12 |
| Scotch Irish | 973 | 0.67 |
| Welsh | 904 | 0.63 |
| British | 804 | 0.56 |
| Czech | 730 | 0.51 |
| Scandinavian | 685 | 0.47 |
| Danish | 477 | 0.33 |
| Russian | 466 | 0.32 |
| Lithuanian | 426 | 0.29 |
| Greek | 423 | 0.29 |
| Canadian | 315 | 0.22 |
| Swiss | 258 | 0.18 |
| French Canadian | 243 | 0.17 |
| Croatian | 199 | 0.14 |
| Eastern European | 183 | 0.13 |
| Northern European | 165 | 0.11 |
| West Indian (except Hispanic groups) | 141 | 0.10 |
| Syrian | 130 | 0.09 |
| Hungarian | 126 | 0.09 |
| Romanian | 120 | 0.08 |
| Moroccan | 119 | 0.08 |
| Finnish | 115 | 0.08 |
| Portuguese | 105 | 0.07 |
| Austrian | 103 | 0.07 |
| Jamaican | 94 | 0.07 |
| Liberian | 92 | 0.06 |
| Bulgarian | 80 | 0.06 |
| Czechoslovakian | 73 | 0.05 |
| Ethiopian | 68 | 0.05 |
| Ukrainian | 68 | 0.05 |
| Serbian | 67 | 0.05 |
| Yugoslavian | 64 | 0.04 |
| Arab | 55 | 0.04 |
| Lebanese | 54 | 0.04 |
| Slovak | 51 | 0.04 |
| Iraqi | 49 | 0.03 |
| Brazilian | 45 | 0.03 |
| Iranian | 45 | 0.03 |
| Slavic | 45 | 0.03 |
| Slovene | 42 | 0.03 |
| Turkish | 38 | 0.03 |
| Albania | 33 | 0.02 |
| Sudanese | 24 | 0.02 |
| Haitian | 21 | 0.02 |
| Pennsylvania German | 19 | 0.01 |
| Ghanaian | 16 | 0.01 |
| Australian | 15 | 0.01 |
| Latvian | 15 | 0.01 |
| West Indian | 14 | 0.01 |
| Palestinian | 12 | 0.01 |
| Belizean | 12 | 0.01 |
| Armenian | 10 | 0.01 |
| Zimbabwean | 9 | 0.01 |
| Macedonian | 8 | 0.01 |
| German Russian | 7 | 0.01 |
| Nigerian | 7 | 0.01 |
| Ugandan | 1 | 0.00 |