Population (2020)23,514
Washington County
MissouriPotosi is the county seat of Washington County, Missouri. Local heritage resources include Bellevue Valley Historical Society, Inc., Old Mines Area Historical Society, Inc..
Washington County at a Glance
Population (2020)23,514
County SeatPotosi
StateMissouri
Guide TypeCounty
Housing Units (2020)10,719
Land Area759.9 sq mi
Water Area2.6 sq mi
Forecast LocationCrawford County
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Discover Washington County
Washington County
Potosi is the county seat of Washington County, Missouri. Local heritage resources include Bellevue Valley Historical Society, Inc., Old Mines Area Historical Society, Inc..
Use this guide to explore businesses serving Washington County, read local news and find public resources. The weather panel shows the forecast for Crawford County, Missouri.
Get to Know the Area
Local identity
Potosi is the county seat of Washington County, Missouri. Local heritage resources include Bellevue Valley Historical Society, Inc., Old Mines Area Historical Society, Inc..
Plan your visit
Explore Washington State Park.
Support local businesses
Open a portrait ad or sponsor banner to visit a featured business page and find its contact information.
Washington County. Local places. Useful connections.
My Local Guide
Washington County
Missouri Places and Stories
Washington County news via Google News
Washington County Traffic Death - My Mo Info
Washington County Traffic Death My Mo Info
Read the Story Nov 3, 2026 • 2 min read
Around Washington County
Stories from every corner of Washington County.
Washington County Traffic Death - My Mo Info
Washington County Traffic Death My Mo Info
Nov 3, 2026 • 2 min read
Bellview man dies after crashing into tree blocking the roadway in Washington County - KRCG
Bellview man dies after crashing into tree blocking the roadway in Washington County KRCG
Nov 3, 2026 • 2 min read
Man killed after striking downed tree in Washington County - Yahoo
Man killed after striking downed tree in Washington County Yahoo
Nov 3, 2026 • 2 min read
Man dies after crashing into downed tree in Washington County - KSDK
Man dies after crashing into downed tree in Washington County KSDK
Nov 3, 2026 • 2 min read
1 dead, 3 injured in crash involving 4 vehicles in Washington County - KSDK
1 dead, 3 injured in crash involving 4 vehicles in Washington County KSDK
Oct 31, 2026 • 2 min read
Shop - Dine - Discover
Meet Local Businesses
Support the businesses that help make our communities thrive. From family-owned shops and restaurants to trusted local services, discover businesses worth visiting throughout the county.
Public Resources
Find the Right Service
Official directories and agency links for residents and visitors. Use the county or city filters on the linked sites to find the service you need.
Government
Missouri county government directory
Find county offices and official contacts through the Missouri Association of Counties.
Schools
Missouri school directory
Filter the state school directory by county to find districts and school buildings.
Hospitals
Missouri Department of Health and Senior Services
Use the state health department’s hospital and provider resources to locate facilities and confirm available services.
Public Safety
Missouri Department of Public Safety
Find state public safety agencies and law enforcement resources.
Emergency Services
Missouri State Emergency Management Agency
Find preparedness information, recovery resources and state emergency updates. Call 911 for an emergency.
State Parks
Missouri State Parks
Find parks, historic sites, maps and current visitor information.
Trails
Missouri parks and trails map
Explore the state parks and trails map, then check the managing agency for current access information.
Utilities
Missouri utility locator
Search by community for utility providers; confirm service availability for the property with the provider.
Libraries
Missouri State Library
Use Find a library to locate public library services in the area.
Courts
Missouri Courts
Find Missouri court locations and official court information.
DMV
Missouri license office locator
Locate a license office and check its services before visiting.
Transportation
Missouri Department of Transportation
Find road information, travel resources and transportation contacts.
Postal Services
USPS location finder
Search by city or ZIP Code to find post offices and postal services.
Veterans
Missouri Veterans Commission
Find veterans service officers and state veterans resources.
Employment
Missouri job and career services
Find job search assistance, career resources and Missouri Job Centers.
Plan Your Next Step
Helpful starting points for life and travel in Washington County.
Local Information
Questions About Washington County
County facts, visitor resources and practical links.
Potosi is the county seat of Washington County, Missouri. Local heritage resources include Bellevue Valley Historical Society, Inc., Old Mines Area Historical Society, Inc..
The county seat is Potosi.
The population of 23,514 is the April 1, 2020 Census count. It is a historical census figure, not a current estimate. View Census data
Browse Missouri’s county heritage directory and select Washington.
Start with Washington State Park. Use Missouri’s parks and trails map for additional options.
Use Missouri’s school directory and filter by county or district.
Open the Missouri county directory to locate official county contacts.
Use the USPS ZIP Code lookup with the full street address. A county may contain multiple ZIP Codes.
The forecast is for Crawford County, Missouri, a nearby forecast shared with this guide. Conditions elsewhere in the area can differ.
Select a portrait advertisement or sponsor banner on this page. Both open the matching business page with further information.
County population, housing and area figures come from the 2020 Census; county seats come from Missouri DNR. News headlines link to their publishers through the configured RSS feed.
Shop - Dine - Discover
Meet Local Businesses
Support the businesses that help make our communities thrive. From family-owned shops and restaurants to trusted local services, discover businesses worth visiting throughout the county.
My Local Guide
Explore Washington County
Local Businesses and Places to StartVisit featured businesses and use official resources to plan your time in the area.
Featured Businesses
History and Culture
Missouri county heritage directory
Bellevue Valley Historical Society, Inc., Old Mines Area Historical Society, Inc., Mine Au Breton Historical Society, Washington State Park
Parks and Trails
Discover Missouri locally.Keep exploring.