Musselshell County's 2026 population is estimated at 5,602, reflecting a 1.36% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Musselshell County is the 35th largest county in Montana. The 2010 population was 4,555 and has grown 22.99% since 2010.
Data after 2023 is projected based on recent change
Overall: 51.3 years
Female: 52.9 years
Male: 48.9 years
There are 4,154 adults, (1,494 of whom are seniors) in Musselshell County.
Female: 2,500 (48.5%)
Male: 2,652 (51.5%)
The racial composition of Musselshell County includes 87.25% White, 3.8% Native American, 3.69% other race, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 4,495 | 87.25% |
| Two or more races | 271 | 5.26% |
| Native American | 196 | 3.8% |
| Other race | 190 | 3.69% |
Musselshell County 's average per capita income is $36,329. Household income levels show a median of $58,920. The poverty rate stands at 17.03%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $80,725 | - |
| Families | $73,828 | $84,033 |
| Households | $58,920 | $77,399 |
| Non Families | $28,839 | $60,797 |
Average Income
Median Household Income
Poverty Rate
