St. Charles County, Missouri
St. Charles County is a county in Missouri. Its county FIPS code is 29183. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 29183
- Representative coordinates
- 38.781102, -90.674915
- County type
- County
- County seat or government
- St. Charles
- Resident population, July 2025
- 426,499
- Land area
- 1,451.204 km²
- Water area
- 83.022 km²
- State
- Missouri
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in St. Charles County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
63301 · 63303 · 63304 · 63332 · 63341 · 63348 · 63357 · 63365 · 63366 · 63367 · 63368 · 63373 · 63376 · 63385 · 63386
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
St. Charles County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Augusta town, MO
- Cottleville city, MO
- Dardenne Prairie city, MO
- Defiance CDP, MO
- Flint Hill city, MO
- Foristell city, MO
- Josephville village, MO
- Lake St. Louis city, MO
- New Melle city, MO
- O'Fallon city, MO
- Portage Des Sioux city, MO
- St. Charles city, MO
- St. Paul city, MO
- St. Peters city, MO
- Weldon Spring city, MO
- Weldon Spring Heights town, MO
- Wentzville city, MO
- West Alton city, MO
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.