Rock County's 2026 population is estimated at 9,373, reflecting a -0.8% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Rock County is the 70th largest county in Minnesota. The 2010 population was 9,658 and has grown -2.95% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.2 years
Female: 42.8 years
Male: 38.6 years
There are 7,272 adults, (1,966 of whom are seniors) in Rock County.
Female: 4,820 (50.1%)
Male: 4,801 (49.9%)
The racial composition of Rock County includes 93.06% White, and smaller percentages for other race, Native American, Asian, Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 8,953 | 93.06% |
| Two or more races | 433 | 4.5% |
| Other race | 123 | 1.28% |
| Native American | 55 | 0.57% |
| Asian | 43 | 0.45% |
| Black or African American | 14 | 0.15% |
Rock County 's average per capita income is $50,996. Household income levels show a median of $71,295. The poverty rate stands at 10.62%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $104,849 | - |
| Families | $100,605 | $112,392 |
| Households | $71,295 | $91,311 |
| Non Families | $34,202 | $49,738 |
Average Income
Median Household Income
Poverty Rate
