DeKalb 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 100.92K DeKalb County, IL population, 25.64K had German ancestry (25.41%), 21.97K had Other Groups ancestry (21.77%), and 20.96K had Unclassified ancestry (20.77%).
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.
DeKalb County, IL Population By Ancestry in 2021
Items per page:
0 of 0
| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| German | 25643 | 25.41 |
| Other Groups | 21966 | 21.77 |
| Unclassified | 20964 | 20.77 |
| Irish | 15256 | 15.12 |
| English | 9103 | 9.02 |
| Italian | 7311 | 7.24 |
| Polish | 6260 | 6.20 |
| Swedish | 4920 | 4.88 |
| Norwegian | 4550 | 4.51 |
| American | 2994 | 2.97 |
| French (except Basque) | 2313 | 2.29 |
| Scottish | 2049 | 2.03 |
| European | 1285 | 1.27 |
| Czech | 1028 | 1.02 |
| Dutch | 954 | 0.95 |
| Russian | 682 | 0.68 |
| Subsaharan African | 668 | 0.66 |
| Yugoslavian | 645 | 0.64 |
| Ukrainian | 637 | 0.63 |
| Greek | 632 | 0.63 |
| Danish | 615 | 0.61 |
| Hungarian | 599 | 0.59 |
| Scandinavian | 535 | 0.53 |
| Swiss | 522 | 0.52 |
| Scotch Irish | 520 | 0.52 |
| Lithuanian | 508 | 0.50 |
| French Canadian | 485 | 0.48 |
| Welsh | 470 | 0.47 |
| Romanian | 438 | 0.43 |
| African | 429 | 0.43 |
| British | 309 | 0.31 |
| West Indian (except Hispanic groups) | 263 | 0.26 |
| Finnish | 261 | 0.26 |
| Palestinian | 242 | 0.24 |
| Eastern European | 214 | 0.21 |
| Czechoslovakian | 213 | 0.21 |
| Austrian | 192 | 0.19 |
| Guyanese | 182 | 0.18 |
| Slovak | 179 | 0.18 |
| Slovene | 170 | 0.17 |
| Belgian | 163 | 0.16 |
| Croatian | 162 | 0.16 |
| Jamaican | 147 | 0.15 |
| Serbian | 146 | 0.14 |
| Nigerian | 110 | 0.11 |
| Australian | 95 | 0.09 |
| British West Indian | 93 | 0.09 |
| Lebanese | 91 | 0.09 |
| Canadian | 85 | 0.08 |
| Bulgarian | 80 | 0.08 |
| Northern European | 80 | 0.08 |
| Armenian | 79 | 0.08 |
| Brazilian | 75 | 0.07 |
| Estonian | 59 | 0.06 |
| Israeli | 58 | 0.06 |
| Jordanian | 52 | 0.05 |
| Sudanese | 52 | 0.05 |
| Slavic | 49 | 0.05 |
| Latvian | 45 | 0.05 |
| Turkish | 45 | 0.05 |
| Ghanaian | 43 | 0.04 |
| Luxembourger | 28 | 0.03 |
| Portuguese | 25 | 0.03 |
| Haitian | 23 | 0.02 |
| Ethiopian | 13 | 0.01 |
| Iranian | 10 | 0.01 |
| Egyptian | 9 | 0.01 |
| Pennsylvania German | 9 | 0.01 |
| Kenyan | 7 | 0.01 |
| Albania | 4 | 0.00 |
| South African | 4 | 0.00 |
| Ugandan | 4 | 0.00 |
| Macedonian | 3 | 0.00 |