Sanilac County, Michigan
Located in Michigan, Sanilac County has a population of 40,462 residents and a median age of 45.5 years, making it the #1,197 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 15.3%. The median home value is $168,300, and the median household income is $58,863, which is 22% below the national median.
Demographics
Sanilac County has a population of 40,462, making it the #1,197 most populous county in the US. The median age is 45.5 years, which is 17.0% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Sanilac County is $58,863, ranking #2,184 out of 3,222 counties — 21.7% below the national median. The poverty rate is 15.3% and unemployment stands at 6.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Sanilac County is $168,300 (-40.3% vs national). Renters pay a median of $807/mo and the homeownership rate is 82.6%.
Median Home Value Trend
Rankings →Household Type
Education
In Sanilac County, 16.5% of adults age 25+ hold a bachelor's degree or higher, which is 51.1% below the national average, ranking #2,593 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Sanilac County is 75.3 years. 20.4% of adults report poor or fair health and 6.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
22.6% of adults in Sanilac County smoke , 38.5% are obese , and 19.8% report excessive drinking. The drug overdose death rate is 18.9 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 16.1 per 100,000. Motor vehicle deaths occur at a rate of 17.1 per 100,000.
Suicide Rate Trend
Families & Children
20.1% of children in Sanilac County live in poverty . The teen birth rate is 14.6 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Sanilac County is 70.0%. The mean commute time is 31.0 min, which is 12.5% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Sanilac County voted Republican with a margin of 47.7%. The vote was 25.5% Dem / 73.2% Rep. Compared to 2020, the margin shifted 2.2 toward Republicans .
Vote Share Over Time
About Sanilac County, Michigan
Sanilac County, Michigan has a total population of 40,462, making it the 1,197th most populous county in the United States. The median age in Sanilac County is 45.5 years, which is 17.0% above the national median of 38.9 years.
The median household income in Sanilac County is $58,863, which ranks #2,184 of 3,222 counties nationwide. This is 21.7% below the national median of $75,149. The poverty rate is 15.3%, higher than the national rate of 12.6%. The unemployment rate stands at 6.0%.
The median home value in Sanilac County is $168,300, 40.3% below the national median. Renters in Sanilac County pay a median gross rent of $807 per month. The homeownership rate is 82.6%, compared to the national rate of 64.4%.
In Sanilac County, 16.5% of residents aged 25 and older hold a bachelor's degree or higher, 51.1% below the national average of 33.7%. Health insurance coverage stands at 92.2% of the population. The average commute time for workers is 31.0 min.
Sanilac County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 91.9% of the population, followed by Hispanic or Latino (4.3%) and Two or More Races (2.8%).
All data for Sanilac County, Michigan comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.