Sanilac County's 2026 population is estimated at 40,011, reflecting a -0.35% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Sanilac County is the 41st largest county in Michigan. The 2010 population was 43,087 and has grown -7.14% since 2010.
Data after 2023 is projected based on recent change
Overall: 45.5 years
Female: 46.3 years
Male: 44.7 years
There are 31,990 adults, (9,406 of whom are seniors) in Sanilac County.
Female: 20,059 (49.6%)
Male: 20,403 (50.4%)
The racial composition of Sanilac County includes 93.29% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 37,745 | 93.29% |
| Two or more races | 1,879 | 4.64% |
| Other race | 502 | 1.24% |
| Black or African American | 165 | 0.41% |
| Asian | 115 | 0.28% |
| Native American | 48 | 0.12% |
| Native Hawaiian or Pacific Islander | 8 | 0.02% |
Sanilac County 's average per capita income is $41,876. Household income levels show a median of $58,863. The poverty rate stands at 15.33%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $84,301 | $100,603 |
| Families | $73,769 | $91,633 |
| Households | $58,863 | $77,878 |
| Non Families | $35,600 | $48,142 |
Average Income
Median Household Income
Poverty Rate
