| County Seat | County | Population |
| Stillwell | |
| Cherokee | |
| Atoka | |
| Beaver | |
| Sayre | |
| Watonga | |
| Durant | |
| Anadarko | |
| El Reno | |
| Ardmore | |
| Tahlequah | |
| Hugo | |
| Boise City | |
| Norman | |
| Colgate | |
| Lawton | |
| Walters | |
| Vinita | |
| Sapulpa | |
| Arapaho | |
| Jay | |
| Taloga | |
| Arnett | |
| Enid | |
| Pauls Valley | |
| Chickasha | |
| | County Seat | County | Population |
| Medford | |
| Magnum | |
| Hollis | |
| Buffalo | |
| Stigler | |
| Holdenville | |
| Altus | |
| Waurika | |
| Tishomingo | |
| Newkirk | |
| Kingfisher | |
| Hobart | |
| Wilburton | |
| Poteau | |
| Chandler | |
| Guthrie | |
| Marietta | |
| Fairview | |
| Madill | |
| Pryor | |
| Purcell | |
| Idabel | |
| Eufala | |
| Sulphur | |
| Muskogee | |
| Perry | |
| | County Seat | County | Population |
| Nowata | |
| Okemah | |
| Oklahoma City | |
| Okmulgee | |
| Pawhuska | |
| Miami | |
| Pawnee | |
| Stillwater | |
| McAlester | |
| Ada | |
| Shawnee | |
| Antlers | |
| Cheyenne | |
| Claremore | |
| Wewoka | |
| Sallisaw | |
| Duncan | |
| Guymon | |
| Frederick | |
| Tulsa | |
| Wagoner | |
| Bartlesville | |
| Cordell | |
| Alva | |
| Woodward | |
|