County · code 40087
McClain CountyOklahoma
McClain County is a county in Oklahoma with its seat in Purcell, formed in 1907.
- Founded1907
- County seatPurcell
- Named forCharles M. McClain
- Land area571 sq mi + 9.5 sq mi water
- Population41,662 2020 Census
- Parcels mapped25,438 checked 15 October 2026
Where it is
McClain on the map of Oklahoma
Oklahoma has 77 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1907
An old deed may name a county that no longer exists, or a boundary that has since moved.
McClain County was created on November 16, 1907, from former Indian Territory and named after Charles M. McClain.
- 1907McClain County created McClain created from former Indian Territory. · Okla. Constitution [1907], art. 17, sec. 8; Swindler, 8:150
Land and parcels
What the maps cover in McClain
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 25,438 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 15 October 2026 · checked 15 October 2026 -
Address points Missing
No public address points layer found for McClain County yet.
-
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
McClain by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Inside a city or town, permits usually come from that city rather than the county.
Zoning and code
County government
- County government
The official website of McClain County.
See your own lot on these maps
Open McClain County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about McClain County
- When was McClain County founded?
- McClain County was founded in 1907, and named after Charles M. McClain.
- What is the county seat of McClain County?
- The county seat of McClain County is Purcell.
- Is there an online parcel map for McClain County?
- Yes. A public source publishes a parcel map of 25,438 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has McClain County's boundary or name changed?
- McClain County was created in 1907. The Atlas of Historical County Boundaries records no boundary change since.
- Is my lot in a flood zone?
- We do not have flood maps for McClain County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby