Oklahoma Counties Directory & Interactive Map
Complete official guide to all 77 counties in Oklahoma (OK). Explore 2024 US Census population estimates, county seats, FIPS codes, land areas, and interactive mapping tools powered by GeoMap Suite.
Oklahoma County Breakdown
Showing 6 of 6 documented counties and seats.
County Name | FIPS | County Seat | Population (Census) | Land Area | Quick Tool |
|---|---|---|---|---|---|
| Oklahoma County | 40109 | Oklahoma City | 796,292 | 709 sq mi | Lookup |
| Tulsa County | 40143 | Tulsa | 669,279 | 570 sq mi | Lookup |
| Cleveland County (Norman) | 40027 | Norman | 295,528 | 536 sq mi | Lookup |
| Canadian County | 40017 | El Reno | 154,405 | 897 sq mi | Lookup |
| Comanche County (Lawton) | 40031 | Lawton | 121,125 | 1,069 sq mi | Lookup |
| Rogers County | 40131 | Claremore | 95,840 | 675 sq mi | Lookup |
Geographic Structure of Oklahoma Counties
County Administration & Governance
In Oklahoma, county governments manage vital public infrastructure, tax assessments, law enforcement, judicial courts, election administration, and public records. The county seat (Oklahoma City and other municipal headquarters) houses the primary courthouse, commissioners, and sheriff’s department.
All Oklahoma counties carry a unique 5-digit Federal Information Processing Standard (FIPS) code, where the first two digits (40) designate the state and the remaining three digits identify each specific jurisdiction.
Geographic & Demographic Highlights
- Most Populous County:Oklahoma County (796,292 residents)
- Largest by Land Area:Comanche County (Lawton) (1,069 sq mi)
- State Capital:Oklahoma City
- Census Bureau Region:South United States
Demographic calculations derive from the United States Census Bureau 2024 Population Estimates Program (PEP) and TIGER/Line geographic boundary files.