Mercer County's 2026 population is estimated at 8,400, reflecting a 0.31% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Mercer County is the 17th largest county in North Dakota. The 2010 population was 8,418 and has grown -0.21% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.9 years
Female: 42.8 years
Male: 43.1 years
There are 6,388 adults, (1,876 of whom are seniors) in Mercer County.
Female: 4,151 (49.8%)
Male: 4,186 (50.2%)
The racial composition of Mercer County includes 91.72% White, and smaller percentages for Native American, other race, Asian, Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 7,647 | 91.72% |
| Two or more races | 308 | 3.69% |
| Native American | 204 | 2.45% |
| Other race | 135 | 1.62% |
| Asian | 42 | 0.5% |
| Black or African American | 1 | 0.01% |
Mercer County 's average per capita income is $51,710. Household income levels show a median of $80,946. The poverty rate stands at 9.67%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $113,257 | - |
| Families | $102,609 | $114,280 |
| Households | $80,946 | $96,779 |
| Non Families | $51,010 | $63,376 |
Average Income
Median Household Income
Poverty Rate