Population (2020)405,262
St. Charles County
MissouriSt. Charles is the county seat of St. Charles County. Missouri River landscapes and the Augusta wine region are part of the county’s character.
St. Charles County at a Glance
Population (2020)405,262
County SeatSt Charles
StateMissouri
Guide TypeCounty
Housing Units (2020)161,144
Land Area560.5 sq mi
Water Area32.1 sq mi
Forecast LocationSt. Charles County
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Meet Local Businesses
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Discover St. Charles County
St. Charles County
St. Charles is the county seat of St. Charles County. Missouri River landscapes and the Augusta wine region are part of the county’s character.
Use this guide to explore businesses serving St. Charles County, read local news and find public resources. The weather panel shows the forecast for St. Charles County, Missouri.
Get to Know the Area
Local identity
St. Charles is the county seat of St. Charles County. Missouri River landscapes and the Augusta wine region are part of the county’s character.
Plan your visit
Explore Edward "Ted" and Pat Jones Confluence Point State Park, First Missouri State Capitol State Historic Site.
Support local businesses
Open a portrait ad or sponsor banner to visit a featured business page and find its contact information.
St. Charles County. Local places. Useful connections.
My Local Guide
St. Charles County
Missouri Places and Stories
St. Charles County news via Google News
Wagner vs. Wellman: Live results from Missouri's 2nd Congressional District election on Nov. 3 - KSDK
Wagner vs. Wellman: Live results from Missouri's 2nd Congressional District election on Nov. 3 KSDK
Read the Story Nov 4, 2026 • 2 min read
Around St. Charles County
Stories from every corner of St. Charles County.
Wagner vs. Wellman: Live results from Missouri's 2nd Congressional District election on Nov. 3 - KSDK
Wagner vs. Wellman: Live results from Missouri's 2nd Congressional District election on Nov. 3 KSDK
Nov 4, 2026 • 2 min read
Did Missouri's Proposition A pass? | Live election results for Nov. 3, 2026 - KSDK
Did Missouri's Proposition A pass? | Live election results for Nov. 3, 2026 KSDK
Nov 4, 2026 • 2 min read
Steve Ehlmann wins sixth term for St. Charles County Executive - FOX 2
Steve Ehlmann wins sixth term for St. Charles County Executive FOX 2
Nov 3, 2026 • 2 min read
Gas leak temporarily closes polling place in St. Charles County - KSDK
Gas leak temporarily closes polling place in St. Charles County KSDK
Nov 3, 2026 • 2 min read
Tens of thousands of early votes already cast in St. Louis County - FOX 2
Tens of thousands of early votes already cast in St. Louis County FOX 2
Nov 3, 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 St. Charles County.
Local Information
Questions About St. Charles County
County facts, visitor resources and practical links.
St. Charles is the county seat of St. Charles County. Missouri River landscapes and the Augusta wine region are part of the county’s character.
The county seat is St Charles.
The population of 405,262 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 St. Charles.
Start with Edward “Ted” and Pat Jones Confluence Point State Park, First Missouri State Capitol State Historic Site. 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 St. Charles County, Missouri. 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 St. Charles 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
Edward “Ted” and Pat Jones Confluence Point State Park, First Missouri State Capitol State Historic Site, Gateway Military History, Lewis & Clark Center
Parks and Trails
Discover Missouri locally.Keep exploring.