| | Pittsburg County | OK | 40121 | | McAlester, OK 32540 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=PittsburgCounty+OK |
| | Pontotoc County | OK | 40123 | | Ada, OK 10220 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=PontotocCounty+OK |
| | Pottawatomie County | OK | 40125 | | Shawnee, OK 43060 | Oklahoma City-Shawnee, OK 416 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=PottawatomieCounty+OK |
| | Pushmataha County | OK | 40127 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=PushmatahaCounty+OK |
| | Roger Mills County | OK | 40129 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=RogerMillsCounty+OK |
| | Rogers County | OK | 40131 | | Tulsa, OK 46140 | Tulsa-Bartlesville-Muskogee,
OK 538 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=RogersCounty+OK |
| | Seminole County | OK | 40133 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=SeminoleCounty+OK |
| | Sequoyah County | OK | 40135 | | Fort Smith, AR-OK 22900 | | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=SequoyahCounty+OK |
| | Stephens County | OK | 40137 | | Duncan, OK 20340 | Lawton-Duncan, OK 334 | Central | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=StephensCounty+OK |
| | Texas County | OK | 40139 | | Guymon, OK 25100 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=TexasCounty+OK |