Jefferson County, CO Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2024.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 580.13K Jefferson County, CO population, 136.10K had Other Groups ancestry (23.46%), 126.84K had Unclassified ancestry (21.86%), and 125.76K had German ancestry (21.68%).
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 Colorado counties, and for Colorado.
Data Source: US Census - ACS 5-Year Estimates (2021).
Jefferson County, CO Population By Ancestry in 2021
Items per page:
0 of 0
| Ancestry | Number of Ancestry | Percentage of Population (%) |
|---|---|---|
| Other Groups | 136103 | 23.46 |
| Unclassified | 126840 | 21.86 |
| German | 125763 | 21.68 |
| English | 75440 | 13.00 |
| Irish | 75224 | 12.97 |
| Italian | 35365 | 6.10 |
| American | 19302 | 3.33 |
| European | 18344 | 3.16 |
| Polish | 17031 | 2.94 |
| Swedish | 15748 | 2.72 |
| Scottish | 15317 | 2.64 |
| French (except Basque) | 14445 | 2.49 |
| Norwegian | 13934 | 2.40 |
| Dutch | 10181 | 1.76 |
| Scotch Irish | 6766 | 1.17 |
| Welsh | 5908 | 1.02 |
| Russian | 5851 | 1.01 |
| Danish | 5458 | 0.94 |
| Czech | 4774 | 0.82 |
| British | 4615 | 0.80 |
| Scandinavian | 4039 | 0.70 |
| French Canadian | 2904 | 0.50 |
| Swiss | 2597 | 0.45 |
| Austrian | 2362 | 0.41 |
| Greek | 2284 | 0.39 |
| Northern European | 2275 | 0.39 |
| Hungarian | 2013 | 0.35 |
| Eastern European | 1991 | 0.34 |
| Subsaharan African | 1956 | 0.34 |
| Ukrainian | 1767 | 0.31 |
| Portuguese | 1621 | 0.28 |
| Finnish | 1453 | 0.25 |
| Lithuanian | 1433 | 0.25 |
| Canadian | 1221 | 0.21 |
| Romanian | 1053 | 0.18 |
| Croatian | 909 | 0.16 |
| Belgian | 875 | 0.15 |
| African | 822 | 0.14 |
| Slovak | 810 | 0.14 |
| Czechoslovakian | 723 | 0.13 |
| Slovene | 709 | 0.12 |
| Lebanese | 663 | 0.11 |
| Slavic | 581 | 0.10 |
| Serbian | 517 | 0.09 |
| Iranian | 504 | 0.09 |
| Yugoslavian | 430 | 0.07 |
| Armenian | 360 | 0.06 |
| Palestinian | 350 | 0.06 |
| Brazilian | 341 | 0.06 |
| Syrian | 327 | 0.06 |
| Australian | 294 | 0.05 |
| West Indian (except Hispanic groups) | 285 | 0.05 |
| Latvian | 269 | 0.05 |
| South African | 262 | 0.05 |
| Pennsylvania German | 255 | 0.04 |
| Turkish | 254 | 0.04 |
| Estonian | 237 | 0.04 |
| German Russian | 234 | 0.04 |
| Icelander | 234 | 0.04 |
| Ghanaian | 233 | 0.04 |
| Nigerian | 228 | 0.04 |
| Egyptian | 204 | 0.04 |
| Jordanian | 203 | 0.04 |
| Basque | 181 | 0.03 |
| Cajun | 179 | 0.03 |
| Moroccan | 177 | 0.03 |
| Bulgarian | 143 | 0.03 |
| Celtic | 140 | 0.02 |
| New Zealander | 124 | 0.02 |
| Israeli | 113 | 0.02 |
| Barbadian | 102 | 0.02 |
| Ethiopian | 100 | 0.02 |
| Luxembourger | 83 | 0.01 |
| Macedonian | 79 | 0.01 |
| Jamaican | 79 | 0.01 |
| West Indian | 72 | 0.01 |
| Arab | 62 | 0.01 |
| Kenyan | 51 | 0.01 |
| Afghan | 48 | 0.01 |
| Haitian | 34 | 0.01 |
| Alsatian | 23 | 0.00 |
| Assyrian/Chaldean/Syriac | 22 | 0.00 |
| Sierra Leonean | 21 | 0.00 |
| Maltese | 16 | 0.00 |
| Albania | 11 | 0.00 |
| Sudanese | 9 | 0.00 |