Washtenaw County, Michigan
Located in Michigan, Washtenaw County has a population of 369,822 residents and a median age of 35.0 years, making it the #204 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 14.2%. The median home value is $374,100, and the median household income is $89,180, which is 19% above the national median.
Demographics
Washtenaw County has a population of 369,822, making it the #204 most populous county in the US. The median age is 35.0 years, which is 10.0% below 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 Washtenaw County is $89,180, ranking #322 out of 3,222 counties — 18.7% above the national median. The poverty rate is 14.2% and unemployment stands at 4.6%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Washtenaw County is $374,100 (+32.7% vs national). Renters pay a median of $1,463/mo and the homeownership rate is 61.6%.
Median Home Value Trend
Rankings →Household Type
Education
In Washtenaw County, 58.7% of adults age 25+ hold a bachelor's degree or higher, which is 74.2% above the national average, ranking #31 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Washtenaw County is 80.5 years. 13.1% of adults report poor or fair health and 4.3% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
12.1% of adults in Washtenaw County smoke , 30.1% are obese , and 20.6% report excessive drinking. The drug overdose death rate is 23.1 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Washtenaw County is 3.5 per 100,000 and the suicide rate is 11.3 per 100,000. Motor vehicle deaths occur at a rate of 6.6 per 100,000.
Homicide Rate Trend
Families & Children
13.9% of children in Washtenaw County live in poverty and the infant mortality rate is 5.5 per 1,000 live births. The teen birth rate is 4.3 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Washtenaw County is 77.9%. The mean commute time is 26.0 min, which is 5.8% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Washtenaw County voted Democratic with a margin of 44.4%. The vote was 71% Dem / 26.6% Rep. Compared to 2020, the margin shifted 2.2 toward Republicans .
Vote Share Over Time
About Washtenaw County, Michigan
Washtenaw County, Michigan has a total population of 369,822, making it the 204th most populous county in the United States. The median age in Washtenaw County is 35.0 years, which is 10.0% below the national median of 38.9 years.
The median household income in Washtenaw County is $89,180, which ranks #322 of 3,222 counties nationwide. This is 18.7% above the national median of $75,149. The poverty rate is 14.2%, higher than the national rate of 12.6%. The unemployment rate stands at 4.6%.
The median home value in Washtenaw County is $374,100, 32.7% above the national median. Renters in Washtenaw County pay a median gross rent of $1,463 per month. The homeownership rate is 61.6%, compared to the national rate of 64.4%.
In Washtenaw County, 58.7% of residents aged 25 and older hold a bachelor's degree or higher, 74.2% above the national average of 33.7%. Health insurance coverage stands at 96.7% of the population. The average commute time for workers is 26.0 min.
Washtenaw County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 67.2% of the population, followed by Black (non-Hispanic) (11.3%) and Asian (non-Hispanic) (9.2%).
All data for Washtenaw 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.