County · Missouri
Washington County, Missouri
Washington County, Missouri. Washington County had 23,810 residents in 2025 by the Census Bureau's estimate, up 1.2% since 2020, slower than Missouri (+1.9%). It holds 5 places (4 cities, villages and boroughs and 1 census-designated) and 6 census tracts. GEOID 29221.
Residents, July 2025 estimate
23,810
Census Bureau estimate (no margin published)
2020 Census count: 23,514 · ACS 2020-2024: 23,470
Median household income
$56,043
±$6,053 (90% margin)
Missouri: $70,702
Median home value
$129,400
±$14,590 (90% margin)
Missouri: $230,300
Median gross rent
$684
±$121 (90% margin)
Missouri: $1,033
How many people live in Washington County, and is it growing?
The 2020 Census counted 23,514 residents in Washington County. The Census Bureau estimates 23,810 for July 1, 2025, up 1.2% since 2020, slower than Missouri (+1.9%). The 2020-2024 American Community Survey puts the population at 23,470 over 760 square miles of land.
| Measure | Washington County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Total population | 23,470 | 6,191,814 | −1,390 |
| Households | 8,920±359 | 2,508,227 | no clear change |
| Average household size | 2.52±0.10 | 2.40 | no clear change |
| Housing units | 10,734±32 | 2,825,287 | −336 |
Washington County's population since 2000
From 23,344 in 2000 to 23,810 in 2025: up 2.0%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Washington County?
Washington County holds 5 places: 4 cities, villages and boroughs (incorporated places) and 1 census-designated place. The largest is Potosi with 2,568 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Potosi | 2,538 | $39,846 |
|---|---|---|
| IrondaleGEOID 2935396 | 368 | $37,368 |
| Mineral PointGEOID 2948710 | 231 | $41,394 |
| CaledoniaGEOID 2910432 | 131 | $60,417 |
| Terre du Lac | 2,478 | $86,019 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Washington County?
The median resident of Washington County is 40.7 years old; 23.5% are under 18 and 17.9% are 65 or older. The largest group is non-Hispanic white residents at 91.8%, then non-Hispanic residents of two or more races at 5.2%. 0.8% of residents were born outside the United States.
| Measure | Washington County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median age | 40.7±1.5 | 39.0 | no clear change |
| Under 18 years | 23.5%±0.3 pts | 22.3% | – |
| 65 years and over | 17.9%±0.2 pts | 17.9% | – |
| Hispanic or Latino (any race) | 1.1% | 5.2% | −0.3 pts |
| White alone, not Hispanic | 91.8%±1.0 pts | 76.3% | −2.4 pts |
| Black or African American alone, not Hispanic | 1.7%±0.2 pts | 10.9% | no clear change |
| Asian alone, not Hispanic | 0.1%±0.1 pts | 2.1% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.1 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 5.2%±1.0 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.1%±0.1 pts | 0.4% | – |
| Born outside the United States | 0.8%±0.5 pts | 4.5% | – |
| Speak a language other than English at home (age 5+) | 1.7%±0.6 pts | 6.7% | – |
| Civilian veterans (age 18+) | 7.6%±1.4 pts | 7.3% | – |
| With a disability | 23.4%±2.1 pts | 14.9% | – |
| No health insurance coverage | 10.4%±1.9 pts | 8.8% | no clear change |
| High school graduate or higher (age 25+) | 85.5%±1.8 pts | 91.9% | – |
| Bachelor's degree or higher (age 25+) | 11.7%±2.3 pts | 32.4% | no clear change |
| Graduate or professional degree (age 25+) | 4.0%±1.1 pts | 12.6% | – |
| Moved from another state in the past year | 0.5%±0.4 pts | 2.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Washington County earn?
Half of Washington County's 8,920 households earn less than $56,043 a year (±$6,053), against $70,702 in Missouri. In 2015-2019 it was $51,053 in 2024 dollars; the margins of error cannot tell the two periods apart. 17.4% of residents live below the poverty line.
| Measure | Washington County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $56,043±$6,053 | $70,702 | no clear change |
| Mean household income | $75,592±$11,994 | $96,247 | – |
| Per capita income | $29,137±$4,551 | $39,695 | no clear change |
| People below the poverty line | 17.4%±3.0 pts | 12.6% | no clear change |
| Children under 18 below the poverty line | 25.5%±6.5 pts | 15.8% | no clear change |
| Households receiving SNAP | 20.1%±3.4 pts | 9.8% | – |
| Households with a broadband subscription | 82.6%±3.3 pts | 89.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Washington County?
Owners occupy 78.4% of Washington County's occupied homes and renters 21.6%. The median owner-occupied home is valued at $129,400 by its owner (±$14,590). The median renter pays $684 a month including utilities, and 34.1% of renters pay 35% or more of their income on rent.
| Measure | Washington County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $129,400±$14,590 | $230,300 | no clear change |
| Median gross rent | $684±$121 | $1,033 | no clear change |
| Renters paying 35% or more of income on rent | 34.1%±10.0 pts | 36.6% | no clear change |
| Median monthly owner costs, with a mortgage | $1,102±$67 | $1,524 | – |
| Owner-occupied homes | 78.4%±3.5 pts | 68.1% | no clear change |
| Housing units | 10,734±32 | 2,825,287 | −336 |
| Homeowner vacancy rate | 0.8%±0.7 pts | 0.9% | – |
| Rental vacancy rate | 5.0%±4.8 pts | 5.0% | – |
| Single-family detached homes | 67.0%±3.0 pts | 70.5% | – |
| Mobile homes | 27.5%±2.8 pts | 5.2% | – |
| Built 2020 or later | 2.6%±1.0 pts | 1.6% | – |
| Built 1939 or earlier | 8.2%±1.8 pts | 13.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Washington County building?
Builders took permits for 1 new housing units across Washington County in 2025 (1 single-family), 0.0 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Washington County get to work?
81.6% of Washington County's workers drive alone and 5.8% work from home. The average trip to work takes 38.4 minutes. The unemployment rate in 2020-2024 averaged 3.6%.
| Measure | Washington County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 51.8%±2.4 pts | 63.1% | – |
| Unemployment rate | 3.6%±1.5 pts | 4.0% | −3.7 pts |
| Drove alone to work | 81.6%±3.4 pts | 74.8% | – |
| Carpooled | 10.6%±2.5 pts | 8.1% | – |
| Public transportation | 0.0%±0.1 pts | 0.8% | – |
| Walked | 0.8%±0.7 pts | 1.8% | – |
| Worked from home | 5.8%±1.9 pts | 13.0% | no clear change |
| Mean travel time to work | 38.4 min±2.6 | 23.5 min | +6.0 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Washington County's census tracts?
Washington County is divided into 6 census tracts. Among those with a reliable estimate, median household income runs from $46,507 (Tract 4601.01) to $76,918 (Tract 4602).
| Tract 4601.0129221460101 | 3,711±494 | $46,507 |
|---|---|---|
| Tract 4601.0229221460102 | 2,873±533 | $67,887 |
| Tract 460229221460200 | 4,413±585 | $76,918 |
| Tract 460329221460300 | 4,380±457 | $49,750 |
| Tract 460429221460400 | 4,280±464 | $53,581 |
| Tract 460529221460500 | 3,813±445 | $51,377 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Washington County compare with Missouri's other counties?
| Measure | Rank |
|---|---|
| Population | 47th of 115 |
| Growth 2020-2025 | 63rd of 115 |
| Residents per square mile | 57th of 115 |
| Median household income | 77th of 115 |
| Median home value | 96th of 115 |
| Median gross rent | 80th of 115 |
| Poverty rate | 31st of 115 |
| Bachelor's degree or higher | 114th of 115 |
| Median age | 62nd of 115 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Washington County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.