Flathead County, MT Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 103.40K Flathead County, MT population, 24.19K had German ancestry (23.39%), 20.79K had Unclassified ancestry (20.11%), and 15.80K had English ancestry (15.28%).
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 Montana counties, and for Montana.
NB: People could belong to one or more ancestry groups.
Data Source: US Census Bureau.
Flathead County, MT Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| German | 24188 | 23.39 |
| Unclassified | 20789 | 20.11 |
| English | 15802 | 15.28 |
| Irish | 13964 | 13.51 |
| Other Groups | 12639 | 12.22 |
| Norwegian | 9131 | 8.83 |
| American | 4360 | 4.22 |
| Italian | 4192 | 4.05 |
| French (except Basque) | 3832 | 3.71 |
| Swedish | 3674 | 3.55 |
| Scottish | 3263 | 3.16 |
| European | 2781 | 2.69 |
| Dutch | 1628 | 1.57 |
| Scandinavian | 1585 | 1.53 |
| Polish | 1563 | 1.51 |
| Scotch Irish | 1144 | 1.11 |
| Finnish | 1117 | 1.08 |
| Danish | 929 | 0.90 |
| Welsh | 791 | 0.77 |
| French Canadian | 751 | 0.73 |
| Russian | 719 | 0.70 |
| Ukrainian | 633 | 0.61 |
| Northern European | 616 | 0.60 |
| Swiss | 535 | 0.52 |
| Czech | 519 | 0.50 |
| British | 486 | 0.47 |
| Hungarian | 402 | 0.39 |
| Greek | 395 | 0.38 |
| Croatian | 252 | 0.24 |
| Eastern European | 228 | 0.22 |
| Austrian | 221 | 0.21 |
| Canadian | 192 | 0.19 |
| Belgian | 182 | 0.18 |
| Armenian | 176 | 0.17 |
| Slovene | 166 | 0.16 |
| Turkish | 165 | 0.16 |
| Portuguese | 164 | 0.16 |
| Egyptian | 162 | 0.16 |
| Czechoslovakian | 141 | 0.14 |
| Slovak | 124 | 0.12 |
| Romanian | 113 | 0.11 |
| West Indian (except Hispanic groups) | 97 | 0.09 |
| Subsaharan African | 78 | 0.08 |
| Lithuanian | 76 | 0.07 |
| Dutch West Indian | 66 | 0.06 |
| Australian | 62 | 0.06 |
| Lebanese | 55 | 0.05 |
| Yugoslavian | 52 | 0.05 |
| Serbian | 48 | 0.05 |
| German Russian | 42 | 0.04 |
| Slavic | 42 | 0.04 |
| Pennsylvania German | 36 | 0.04 |
| Jamaican | 31 | 0.03 |
| Celtic | 29 | 0.03 |
| Icelander | 27 | 0.03 |
| South African | 19 | 0.02 |
| Bulgarian | 16 | 0.02 |
| Basque | 14 | 0.01 |
| Iranian | 13 | 0.01 |
| Nigerian | 12 | 0.01 |
| Luxembourger | 10 | 0.01 |
| Maltese | 8 | 0.01 |
| Syrian | 6 | 0.01 |
| Arab | 6 | 0.01 |
| Cajun | 5 | 0.01 |
| African | 4 | 0.00 |
| Latvian | 3 | 0.00 |