Washington County, Missouri
Located in Missouri, Washington County has a population of 23,470 residents and a median age of 40.7 years, making it the #1,711 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 17.4%. The median home value is $129,400, and the median household income is $56,043, which is 25% below the national median.
Demographics
Washington County has a population of 23,470, making it the #1,711 most populous county in the US. The median age is 40.7 years, which is 4.6% 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 Washington County is $56,043, ranking #2,403 out of 3,222 counties — 25.4% below the national median. The poverty rate is 17.4% and unemployment stands at 3.6%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Washington County is $129,400 (-54.1% vs national). Renters pay a median of $684/mo and the homeownership rate is 78.4%.
Median Home Value Trend
Rankings →Household Type
Education
In Washington County, 11.7% of adults age 25+ hold a bachelor's degree or higher, which is 65.2% below the national average, ranking #3,124 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Washington County is 69.7 years. 23.0% of adults report poor or fair health and 13.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
24.1% of adults in Washington County smoke , 39.0% are obese , and 19.3% report excessive drinking. The drug overdose death rate is 60.1 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 25.6 per 100,000. Motor vehicle deaths occur at a rate of 28.1 per 100,000.
Suicide Rate Trend
Families & Children
25.4% of children in Washington County live in poverty . The teen birth rate is 34.5 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Washington County is 52.6%. The mean commute time is 41.5 min, which is 50.4% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Washington County voted Republican with a margin of 65.2%. The vote was 17.1% Dem / 82.3% Rep. Compared to 2020, the margin shifted 2.6 toward Republicans .
Vote Share Over Time
About Washington County, Missouri
Washington County, Missouri has a total population of 23,470, making it the 1,711th most populous county in the United States. The median age in Washington County is 40.7 years, which is 4.6% above the national median of 38.9 years.
The median household income in Washington County is $56,043, which ranks #2,403 of 3,222 counties nationwide. This is 25.4% below the national median of $75,149. The poverty rate is 17.4%, higher than the national rate of 12.6%. The unemployment rate stands at 3.6%.
The median home value in Washington County is $129,400, 54.1% below the national median. Renters in Washington County pay a median gross rent of $684 per month. The homeownership rate is 78.4%, compared to the national rate of 64.4%.
In Washington County, 11.7% of residents aged 25 and older hold a bachelor's degree or higher, 65.2% below the national average of 33.7%. Health insurance coverage stands at 89.6% of the population. The average commute time for workers is 41.5 min.
Washington County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 91.8% of the population, followed by Two or More Races (5.2%) and Black (non-Hispanic) (1.7%).
All data for Washington County, Missouri 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.