Oklahoma · FIPS 40095 · County seat: Madill
Marshall County, OK GIS & Parcel Viewer
Looking for lot lines or a parcel number in Marshall County, OK? The quickest route is OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer, the statewide parcel map we keep on file for this county. We link straight to it and add a few tips for getting around.
Open the Marshall County statewide map ↗
Opens okmaps.org in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer |
|---|---|
| Type | Statewide map (covers all of Oklahoma) |
| Website | okmaps.org |
| Access | Free, no login (checked Oct 2026) |
| County seat | Madill |
| Population | 15,970 (2023 Census Bureau estimate) |
| Land area | 371 sq mi |
| FIPS code | 40095 |
Where the parcel data comes from
Marshall County doesn't have its own viewer in our directory, so we point you to a statewide map: OKMaps (Oklahoma Office of Geographic Information) - Statewide Parcels layer. Zoom in on Marshall County to see its parcels. Because a state agency compiles this layer from local data, check with the Marshall County assessor or recorder before relying on a recent change. As of our October 2026 test, anyone could open it without signing in or paying.
Finding a property on this statewide map
- Press the button to load the OKMaps viewer from the Oklahoma Office of Geographic Information.
- Turn on parcels first: open Explore, choose Land Parcels, pick Statewide Parcels and press the green +.
- Pan to Marshall County and keep zooming in until the parcel outlines appear.
- Select a lot to see what the statewide layer lists for it, and confirm anything important with the county's own offices.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
The county in brief
Census Bureau figures put Marshall County at about 15,970 people (2023 estimate) on roughly 371 square miles of land, which is about 43 residents per square mile. Among Oklahoma's 77 counties, it is the 43rd largest by population. Census maps also count about 55 square miles of water inside its boundary. Madill serves as the county seat.
Nearby parcel maps
Marshall County shares a border with the counties below. Each link has its own official map:
Maps vs. surveys
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.