Petroleum County, MT Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2024.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 434 Petroleum County, MT population, 146 had German ancestry (33.64%), 102 had American ancestry (23.50%), and 60 had Unclassified ancestry (13.83%).
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 Montana counties, and for Montana.
Data Source: US Census - ACS 5-Year Estimates (2021).
Petroleum County, MT Population By Ancestry in 2021
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| Ancestry | Number of Ancestry | Percentage of Population (%) |
|---|---|---|
| German | 146 | 33.64 |
| American | 102 | 23.50 |
| Unclassified | 60 | 13.83 |
| Other Groups | 50 | 11.52 |
| Norwegian | 47 | 10.83 |
| English | 43 | 9.91 |
| Irish | 31 | 7.14 |
| Swedish | 10 | 2.30 |
| Polish | 8 | 1.84 |
| Scotch Irish | 7 | 1.61 |
| Scottish | 7 | 1.61 |
| French (except Basque) | 6 | 1.38 |
| Danish | 4 | 0.92 |
| Finnish | 4 | 0.92 |
| French Canadian | 3 | 0.69 |
| Dutch | 2 | 0.46 |
| Italian | 2 | 0.46 |
| Scandinavian | 2 | 0.46 |
| Yugoslavian | 2 | 0.46 |
| Northern European | 1 | 0.23 |