| | Muskogee County | OK | 40101 | | Muskogee, OK 34780 | Tulsa-Bartlesville-Muskogee,
OK 538 | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=MuskogeeCounty+OK |
| | Noble County | OK | 40103 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=NobleCounty+OK |
| | Nowata County | OK | 40105 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=NowataCounty+OK |
| | Okfuskee County | OK | 40107 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=OkfuskeeCounty+OK |
| | Oklahoma County | OK | 40109 | | Oklahoma City, OK 36420 | Oklahoma City-Shawnee, OK 416 | Central | metro county (urban) | mining-dependent | https://maps.google.com/?q=OklahomaCounty+OK |
| | Okmulgee County | OK | 40111 | | Tulsa, OK 46140 | Tulsa-Bartlesville-Muskogee,
OK 538 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=OkmulgeeCounty+OK |
| | Osage County | OK | 40113 | | Tulsa, OK 46140 | Tulsa-Bartlesville-Muskogee,
OK 538 | Central | metro county (urban) | mining-dependent | https://maps.google.com/?q=OsageCounty+OK |
| | Ottawa County | OK | 40115 | | Miami, OK 33060 | Joplin-Miami, MO-OK-KS 309 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=OttawaCounty+OK |
| | Pawnee County | OK | 40117 | | Tulsa, OK 46140 | Tulsa-Bartlesville-Muskogee,
OK 538 | Outlying | metro county (urban) | mining-dependent | https://maps.google.com/?q=PawneeCounty+OK |
| | Payne County | OK | 40119 | | Stillwater, OK 44660 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=PayneCounty+OK |