Carter 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 1.35K Carter County, MT population, 403 had German ancestry (29.87%), 349 had Unclassified ancestry (25.87%), and 182 had Norwegian ancestry (13.49%).
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.
Carter County, MT Population By Ancestry in 2021
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| Ancestry | Population | Percent of Pop. (%) |
|---|---|---|
| German | 403 | 29.87 |
| Unclassified | 349 | 25.87 |
| Norwegian | 182 | 13.49 |
| English | 168 | 12.45 |
| Irish | 126 | 9.34 |
| American | 119 | 8.82 |
| Scotch Irish | 50 | 3.71 |
| European | 47 | 3.48 |
| Polish | 34 | 2.52 |
| Scottish | 33 | 2.45 |
| French (except Basque) | 31 | 2.30 |
| Other Groups | 29 | 2.15 |
| Scandinavian | 26 | 1.93 |
| Swedish | 22 | 1.63 |
| Danish | 18 | 1.33 |
| Czech | 16 | 1.19 |
| Italian | 13 | 0.96 |
| Welsh | 11 | 0.82 |
| British | 6 | 0.45 |
| French Canadian | 6 | 0.45 |
| Hungarian | 5 | 0.37 |
| Finnish | 4 | 0.30 |
| Northern European | 4 | 0.30 |
| Austrian | 3 | 0.22 |
| Basque | 3 | 0.22 |
| Dutch | 3 | 0.22 |
| Swiss | 2 | 0.15 |
| Canadian | 1 | 0.07 |