Oklahoma · FIPS 40087 · County seat: Purcell
McClain County, OK GIS & Parcel Viewer
Looking for lot lines or a parcel number in McClain County, OK? The quickest route is McClain County Assessors Office, 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 McClain County parcel map ↗
Opens property.spatialest.com in a new tab. We link out and never embed or copy parcel data.
McClain County at a glance
| Official map | McClain County Assessors Office |
|---|---|
| Type | County-run map |
| Website | property.spatialest.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Purcell |
| Population | 47,072 (2023 Census Bureau estimate) |
| Land area | 571 sq mi |
| FIPS code | 40087 |
About the official source
McClain 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 McClain County viewer
- Press the button above. This county's viewer runs on Spatialest; 10 counties in our directory use the same service.
- Find the search option and look up a property, or zoom in on the map.
- Click a lot to see its details.
- Check the toolbar for layers, measuring and printing.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
McClain County by the numbers
Census Bureau figures put McClain County at about 47,072 people (2023 estimate) on roughly 571 square miles of land, which is about 82 residents per square mile. That makes it number 20 out of 77 Oklahoma counties by population. The county seat is Purcell.
Nearby parcel maps
Parcels close to the edge of McClain County can fall in the next county over. Neighboring counties:
A note on accuracy
The lines you see online are approximate. They're good for finding a lot and its parcel number, but a legal boundary question needs the recorded plat or a surveyor.