Sheridan County's 2026 population is estimated at 3,364, reflecting a -1.23% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Sheridan County is the 41st largest county in Montana. The 2010 population was 3,368 and has grown -0.12% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.1 years
Female: 43.8 years
Male: 41.9 years
There are 2,867 adults, (833 of whom are seniors) in Sheridan County.
Female: 1,749 (47.7%)
Male: 1,920 (52.3%)
The racial composition of Sheridan County includes 90.52% White, and smaller percentages for Native American, Asian, other race, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 3,321 | 90.52% |
| Two or more races | 230 | 6.27% |
| Native American | 71 | 1.94% |
| Asian | 24 | 0.65% |
| Other race | 18 | 0.49% |
| Native Hawaiian or Pacific Islander | 5 | 0.14% |
Sheridan County 's average per capita income is $42,347. Household income levels show a median of $70,147. The poverty rate stands at 10.42%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $97,727 | - |
| Families | $89,917 | $120,624 |
| Households | $70,147 | $93,765 |
| Non Families | $32,250 | $49,031 |
Average Income
Median Household Income
Poverty Rate