Washington County, MO Demographics

Population 23,470 · Census ACS 2020–24

Choose a measure to map it.Tap a measure to map it. Swipe the row for more. Arrows show the change since 2006–10.

Median age by neighborhoodHistory and comparison ↓︎
Washington County, MO map of median age by neighborhood
Click the map to explore
Younger residents Older residents
Colorblind friendly off

More maps of Washington County: Best Neighborhoods · Walk Grade · Household income · Home prices · Race · Politics · Traffic noise · Internet

Jump to median age ↓︎

Population and households in Washington County

Household size in Washington County

Household size, people per household
PeriodWashington CountyMissouriU.S.
2006–102.632.492.68
2010–142.652.522.73
2015–192.602.502.71
2020–242.602.492.65
Change−0.03−0.00−0.03
Show on the map ↑︎

At 2.60 people per household, Washington County sits close to the national average of 2.65. The typical household here is bigger than in Missouri overall, where it has 2.49 people. Households are largest in the north and smallest in the south.

Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).

Median age in Washington County

Median age, years
PeriodWashington CountyMissouriU.S.
2006–1039.038.437.7
2010–1440.439.238.6
2015–1941.740.039.6
2020–2440.840.140.1
Change+1.8+1.7+2.3
Show on the map ↑︎

At 40.8, the median age in Washington County is close to the national median of 40.1, so its age mix looks much like the country's. The median age has climbed from 39.0 in 2006–10, as it has nationally. The youngest areas are in the center, the oldest in the southeast.

Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).

Single-parent households in Washington County

Single-parent households, % of households
PeriodWashington CountyMissouriU.S.
2006–1013.0%11.3%12.3%
2010–1412.5%11.4%12.3%
2015–1912.0%10.9%11.6%
2020–2411.3%11.0%11.6%
Change−1.7 pts−0.3 pts−0.6 pts
Show on the map ↑︎

Single-parent households are about as common in Washington County as they are nationally: 11.3%, against 11.6%. The single-parent share has fallen 1.7 points since 2006–10, as it has nationally.

Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).

Housing in Washington County

Renters in Washington County

Renters, % of occupied homes
PeriodWashington CountyMissouriU.S.
2006–1019.5%30.0%33.3%
2010–1422.1%32.1%35.6%
2015–1920.6%33.2%36.0%
2020–2421.6%31.9%34.8%
Change+2.1 pts+1.9 pts+1.5 pts
Show on the map ↑︎

Only 21.6% of households in Washington County rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. About half of owners (49.3%) have paid off their mortgages, above the national share of 39.8%. Renting is most common in the center and least common in the northeast. The renter share is up 2.1 points from 2006–10, mirroring the country.

Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).

Vacant homes in Washington County

Vacant homes, % of all homes
PeriodWashington CountyMissouriU.S.
2006–1016.5%11.6%11.4%
2010–1417.0%12.0%11.4%
2015–1915.8%12.2%11.1%
2020–2416.1%10.5%9.6%
Change−0.3 pts−1.1 pts−1.8 pts
Show on the map ↑︎

Vacant homes make up 16.1% of the housing in Washington County, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand.

Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).

Age of homes in Washington County

Age of homes, median year built
PeriodWashington CountyMissouriU.S.
2006–10197919741974
2010–14198219751975
2015–19198219761977
2020–24198519781980
Change+7+4+6
Show on the map ↑︎

Homes in Washington County are a bit newer than the national norm: the median home was built in 1985, versus 1980 across the U.S. The median year built has moved up from 1979 in 2006–10, a sign of steady new building. The newest homes are mostly in the northeast, the oldest in the center.

Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).

Rent in Washington County

Rent, per month
PeriodWashington CountyMissouriU.S.
2006–10$487$740$965
2010–14$513$816$1,040
2015–19$578$899$1,213
2020–24$741$1,122$1,571
Change+$254+$383+$606
Show on the map ↑︎

Rent in Washington County runs $741 a month at the median, utilities included, well below the U.S. median of $1,571. Rent has climbed $254 a month since 2006–10, up 52%, a slower climb than the nation's. The typical renter here spends 28.6% of household income on rent, just under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. The priciest rents are in the northwest; the most affordable are in the northeast.

Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).

Education in Washington County

Bachelor's degrees in Washington County

Bachelor's degrees, % of adults 25+
PeriodWashington CountyMissouriU.S.
2006–107.8%26.0%28.4%
2010–148.0%27.3%29.6%
2015–199.6%29.6%32.1%
2020–2411.1%32.6%35.6%
Change+3.3 pts+6.6 pts+7.2 pts
Show on the map ↑︎

Fewer adults in Washington County have a four-year degree than in the country as a whole: 11.1%, against 35.6% nationally. The share with a degree has risen 3.3 points since 2006–10, as it has nationally. Of Missouri's 115 counties, only two have a lower share of college graduates.

Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).

High school graduates in Washington County

High school graduates, % of adults 25+
PeriodWashington CountyMissouriU.S.
2006–1070.2%86.8%84.9%
2010–1472.5%88.3%86.1%
2015–1976.9%90.0%87.7%
2020–2485.7%91.8%89.3%
Change+15.4 pts+5.1 pts+4.3 pts
Show on the map ↑︎

About one in seven adults in Washington County never finished high school, more than nationally: 85.7% have a diploma or equivalent, against 89.3% across the U.S. The share with a diploma is up 15.4 points from 2006–10, a much bigger shift than nationally. Washington County has a lower share of high school graduates than at least four in five Missouri counties.

High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).

Jobs in Washington County

Unemployment, % of the labor force
PeriodWashington CountyMissouriU.S.
2006–1013.6%7.4%8.1%
2010–1415.0%8.4%9.4%
2015–198.0%4.6%5.6%
2020–245.3%4.1%5.4%
Change−8.3 pts−3.3 pts−2.7 pts
Show on the map ↑︎

At 5.3%, unemployment in Washington County is close to the national rate of 5.4%. The rate is higher than in Missouri as a whole (4.1%). Unemployment has fallen 8.3 points since 2006–10, a much bigger shift than nationally.

Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).

Washington County compared with nearby counties

CountyHousehold sizeMedian ageSingle parentsRentersVacant homesMedian year builtMedian rentBachelor's degreeHigh school diplomaUnemployment
Washington County2.6040.811.3%21.6%16.1%1985$74111.1%85.7%5.3%
St. Francois County2.5139.612.3%31.8%13.2%1981$78817.7%87.3%4.2%
Crawford County2.3442.611.1%30.8%14.1%1983$82614.8%86.6%5.2%
Ste. Genevieve County2.5743.310.9%17.0%14.4%1979$76716.9%93.7%4.3%
Phelps County2.5037.612.3%38.3%14.9%1986$84532.4%89.8%4.1%
Randolph County2.3243.611.7%23.4%11.8%1972$82316.6%89.0%4.9%
Pulaski County2.6330.812.0%38.8%14.3%1992$1,09825.5%94.6%4.7%
Perry County2.3642.311.6%19.1%12.9%1973$71614.1%87.1%4.0%
Franklin County2.3343.813.1%25.9%12.7%1964$81915.5%89.4%7.4%
Camden County2.4951.06.4%17.5%48.4%1988$1,01226.3%92.7%4.3%
Hamilton County2.3343.58.8%23.6%11.3%1971$61719.3%90.5%4.8%

All figures 2020–24.

Counties with similar populations: Dallas County, MO · DeKalb County, TN · Decatur County, GA · Deaf Smith County, TX · De Witt County, IL · De Soto Parish, LA · Dawson County, NE · Dawson County, GA · Davison County, SD · Daviess County, IN

About these numbers

Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Washington County. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.

No other site shows detail at this level for free. We are able to keep this site free by receiving a small commission from the referring links on this page. Please share or cite this page if you aren’t able to otherwise support our work.