St. Clair County, MI Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 160.07K St. Clair County, MI population, 42.46K had German ancestry (26.53%), 38.72K had Unclassified ancestry (24.19%), and 19.87K had Irish ancestry (12.41%).
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 Michigan counties, and for Michigan.
NB: People could belong to one or more ancestry groups.
Data Source: US Census Bureau.
St. Clair County, MI Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| German | 42457 | 26.53 |
| Unclassified | 38720 | 24.19 |
| Irish | 19867 | 12.41 |
| Other Groups | 19859 | 12.41 |
| Polish | 18822 | 11.76 |
| English | 15752 | 9.84 |
| French (except Basque) | 9737 | 6.08 |
| Italian | 9207 | 5.75 |
| American | 8741 | 5.46 |
| Scottish | 4661 | 2.91 |
| French Canadian | 4332 | 2.71 |
| Dutch | 2722 | 1.70 |
| Belgian | 2292 | 1.43 |
| European | 2216 | 1.38 |
| Swedish | 1738 | 1.09 |
| Hungarian | 1501 | 0.94 |
| Scotch Irish | 1466 | 0.92 |
| Canadian | 1367 | 0.85 |
| Russian | 1091 | 0.68 |
| Norwegian | 1027 | 0.64 |
| British | 783 | 0.49 |
| Finnish | 727 | 0.45 |
| Greek | 675 | 0.42 |
| Welsh | 668 | 0.42 |
| Lebanese | 544 | 0.34 |
| Czech | 505 | 0.32 |
| Slovak | 495 | 0.31 |
| Romanian | 483 | 0.30 |
| Scandinavian | 458 | 0.29 |
| Subsaharan African | 453 | 0.28 |
| Danish | 394 | 0.25 |
| Ukrainian | 385 | 0.24 |
| Austrian | 382 | 0.24 |
| Eastern European | 315 | 0.20 |
| Lithuanian | 287 | 0.18 |
| African | 283 | 0.18 |
| Czechoslovakian | 279 | 0.17 |
| Macedonian | 261 | 0.16 |
| Yugoslavian | 247 | 0.15 |
| Croatian | 176 | 0.11 |
| Northern European | 171 | 0.11 |
| Swiss | 159 | 0.10 |
| Nigerian | 143 | 0.09 |
| Serbian | 140 | 0.09 |
| Egyptian | 122 | 0.08 |
| West Indian (except Hispanic groups) | 117 | 0.07 |
| Australian | 107 | 0.07 |
| Portuguese | 103 | 0.06 |
| Slavic | 102 | 0.06 |
| Estonian | 100 | 0.06 |
| Armenian | 99 | 0.06 |
| Albania | 94 | 0.06 |
| Celtic | 84 | 0.05 |
| Syrian | 79 | 0.05 |
| Cajun | 78 | 0.05 |
| Assyrian/Chaldean/Syriac | 59 | 0.04 |
| Maltese | 58 | 0.04 |
| Trinidadian and Tobagonian | 54 | 0.03 |
| Jamaican | 49 | 0.03 |
| Palestinian | 42 | 0.03 |
| Iranian | 31 | 0.02 |
| Iraqi | 30 | 0.02 |
| Ghanaian | 27 | 0.02 |
| Pennsylvania German | 25 | 0.02 |
| Arab | 24 | 0.02 |
| Turkish | 23 | 0.01 |
| Icelander | 22 | 0.01 |
| Bulgarian | 11 | 0.01 |
| Slovene | 11 | 0.01 |
| Haitian | 11 | 0.01 |
| Carpatho Rusyn | 10 | 0.01 |
| Moroccan | 7 | 0.00 |
| Barbadian | 3 | 0.00 |
| Brazilian | 1 | 0.00 |