Missouri · FIPS 29185 · County seat: Osceola
St. Clair County, MO GIS & Parcel Viewer
Looking for lot lines or a parcel number in St. Clair County, MO? The quickest route is Parcel Map Viewer for St. Clair County, the county parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the St. Clair County parcel map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
St. Clair County at a glance
| Official map | Parcel Map Viewer for St. Clair County |
|---|---|
| Type | County-run map |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Osceola |
| Population | 9,752 (2023 Census Bureau estimate) |
| Land area | 675 sq mi |
| FIPS code | 29185 |
Where the parcel data comes from
St. Clair County runs this viewer (directly or through a contracted vendor), which makes it the closest thing to the source for local parcel lines. When we tested the link in October 2026 it opened with no login and no fee.
How to use the St. Clair County viewer
- Press the button above; an ArcGIS Experience Builder app opens in a new tab. Accept any splash or disclaimer screen.
- Search by address or parcel ID, or pan to the area.
- Select a parcel to view the information the publisher makes available.
- Explore the app's panels for layers, legends or printing.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
St. Clair County by the numbers
St. Clair County had an estimated 9,752 residents in 2023, according to the Census Bureau. With about 675 square miles of land, that works out to roughly 14 people per square mile. Among Missouri's 115 counties, it is the 88th largest by population. Its county seat is Osceola.
Nearby parcel maps
Parcels close to the edge of St. Clair County can fall in the next county over. Neighboring counties:
- Bates County
- Benton County
- Cedar County
- Henry County
- Hickory County
- Polk County
- Vernon County (state list)
Before you rely on the lines
Treat the map as a guide, not a boundary survey: parcel outlines are often shifted a bit from the real corners. A licensed surveyor settles exact lines.