Grundy County, IL Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2024.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 52.36K Grundy County, IL population, 12.86K had German ancestry (24.56%), 9.76K had Irish ancestry (18.64%), and 9.59K had Unclassified ancestry (18.32%).
The chart below shows the top 10 ancestry groups, and the table below shows both the number and percentages for all ancestry groups.
You can see similar information for other Illinois counties, and for Illinois.
Data Source: US Census - ACS 5-Year Estimates (2021).
Grundy County, IL Population By Ancestry in 2021
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| Ancestry | Number of Ancestry | Percentage of Population (%) |
|---|---|---|
| German | 12858 | 24.56 |
| Irish | 9761 | 18.64 |
| Unclassified | 9593 | 18.32 |
| Other Groups | 8662 | 16.54 |
| Italian | 6211 | 11.86 |
| English | 5391 | 10.30 |
| Polish | 5063 | 9.67 |
| Norwegian | 2931 | 5.60 |
| American | 1506 | 2.88 |
| French (except Basque) | 1291 | 2.47 |
| Swedish | 1013 | 1.94 |
| Scottish | 850 | 1.62 |
| Dutch | 806 | 1.54 |
| Lithuanian | 617 | 1.18 |
| Greek | 568 | 1.09 |
| Czech | 555 | 1.06 |
| Scotch Irish | 528 | 1.01 |
| Albania | 476 | 0.91 |
| European | 417 | 0.80 |
| Slovak | 377 | 0.72 |
| Croatian | 341 | 0.65 |
| Danish | 273 | 0.52 |
| British | 245 | 0.47 |
| Slovene | 164 | 0.31 |
| Hungarian | 159 | 0.30 |
| French Canadian | 126 | 0.24 |
| Belgian | 124 | 0.24 |
| Subsaharan African | 119 | 0.23 |
| Welsh | 112 | 0.21 |
| Swiss | 99 | 0.19 |
| Russian | 98 | 0.19 |
| African | 96 | 0.18 |
| Northern European | 94 | 0.18 |
| Czechoslovakian | 86 | 0.16 |
| Austrian | 78 | 0.15 |
| Eastern European | 75 | 0.14 |
| Ukrainian | 62 | 0.12 |
| Finnish | 60 | 0.12 |
| Scandinavian | 50 | 0.10 |
| Bulgarian | 47 | 0.09 |
| Slavic | 40 | 0.08 |
| West Indian (except Hispanic groups) | 37 | 0.07 |
| Yugoslavian | 33 | 0.06 |
| Haitian | 32 | 0.06 |
| Canadian | 26 | 0.05 |
| Latvian | 23 | 0.04 |
| Luxembourger | 20 | 0.04 |
| Palestinian | 17 | 0.03 |
| Ethiopian | 15 | 0.03 |
| Serbian | 14 | 0.03 |
| Romanian | 12 | 0.02 |
| Kenyan | 8 | 0.02 |
| Portuguese | 7 | 0.01 |
| Belizean | 5 | 0.01 |
| Lebanese | 3 | 0.01 |
| Syrian | 2 | 0.00 |
| Australian | 2 | 0.00 |
| Icelander | 2 | 0.00 |