Oklahoma · FIPS 40059 · County seat: Buffalo
Harper County, OK GIS & Parcel Viewer
Looking for lot lines or a parcel number in Harper 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 Harper County statewide map ↗
Opens okmaps.org in a new tab. We link out and never embed or copy parcel data.
Quick 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 | Buffalo |
| Population | 3,190 (2023 Census Bureau estimate) |
| Land area | 1,039 sq mi |
| FIPS code | 40059 |
Where the parcel data comes from
Harper 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 Harper County to see its parcels. Statewide parcel layers are usually stitched together from county files, so the newest splits or sales may show up on the county's own records first. Our October 2026 check found the map open to the public, with no account or payment needed.
Searching for a parcel, step by step
- Open the statewide viewer in a new tab and move the map to Harper County (around Buffalo).
- Nothing parcel-related shows at first. Add it through Explore > Land Parcels > Statewide Parcels, then click the green +.
- Zoom in closely; at wide views the parcel layer stays blank.
- Click a parcel to see its record, and keep the parcel ID handy for later searches with the county assessor or county clerk.
Have a tax bill handy? The parcel or account number on it is usually the fastest way to search.
Harper County by the numbers
The U.S. Census Bureau estimated Harper County's population at 3,190 in 2023, spread over about 1,039 square miles of land, or roughly 3.1 people per square mile. Among Oklahoma's 77 counties, it is the 75th largest by population. Its county seat is Buffalo.
Nearby parcel maps
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Harper County:
Maps vs. surveys
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.