Washington County, CO Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 4.83K Washington County, CO population, 1.60K had German ancestry (33.06%), 1.34K had Unclassified ancestry (27.78%), and 811 had Other Groups ancestry (16.78%).
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 Colorado counties, and for Colorado.
NB: People could belong to one or more ancestry groups.
Data Source: US Census Bureau.
Washington County, CO Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| German | 1598 | 33.06 |
| Unclassified | 1343 | 27.78 |
| Other Groups | 811 | 16.78 |
| Irish | 532 | 11.01 |
| English | 413 | 8.54 |
| American | 212 | 4.39 |
| Scottish | 125 | 2.59 |
| Italian | 124 | 2.57 |
| Norwegian | 99 | 2.05 |
| French (except Basque) | 98 | 2.03 |
| Scotch Irish | 96 | 1.99 |
| Dutch | 93 | 1.92 |
| Russian | 76 | 1.57 |
| Polish | 74 | 1.53 |
| Swedish | 74 | 1.53 |
| European | 72 | 1.49 |
| British | 40 | 0.83 |
| Czech | 35 | 0.72 |
| Danish | 33 | 0.68 |
| Basque | 25 | 0.52 |
| Scandinavian | 23 | 0.48 |
| Welsh | 21 | 0.43 |
| Subsaharan African | 11 | 0.23 |
| African | 11 | 0.23 |
| Belgian | 8 | 0.17 |
| Hungarian | 8 | 0.17 |
| Croatian | 7 | 0.14 |
| Portuguese | 6 | 0.12 |
| Northern European | 4 | 0.08 |
| Czechoslovakian | 3 | 0.06 |
| Eastern European | 3 | 0.06 |
| Slovak | 3 | 0.06 |
| Austrian | 2 | 0.04 |
| Greek | 2 | 0.04 |
| Maltese | 1 | 0.02 |