| | | Canadian County | OK | 40017 | | Oklahoma City, OK 36420 | Oklahoma City-Shawnee, OK 416 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=CanadianCounty+OK |
| | | Cleveland County | OK | 40027 | | Oklahoma City, OK 36420 | Oklahoma City-Shawnee, OK 416 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=ClevelandCounty+OK |
| | | Comanche County | OK | 40031 | | Lawton, OK 30020 | Lawton-Duncan, OK 334 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=ComancheCounty+OK |
| | | Cotton County | OK | 40033 | | Lawton, OK 30020 | Lawton-Duncan, OK 334 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=CottonCounty+OK |
| | | Creek County | OK | 40037 | | Tulsa, OK 46140 | Tulsa-Bartlesville-Muskogee,
OK 538 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=CreekCounty+OK |
| | | Grady County | OK | 40051 | | Oklahoma City, OK 36420 | Oklahoma City-Shawnee, OK 416 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=GradyCounty+OK |
| | | Le Flore County | OK | 40079 | | | | | metro county (urban) | nonspecialized | https://maps.google.com/?q=LeFloreCounty+OK |
| | | Lincoln County | OK | 40081 | | Oklahoma City, OK 36420 | Oklahoma City-Shawnee, OK 416 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=LincolnCounty+OK |
| | | Logan County | OK | 40083 | | Oklahoma City, OK 36420 | Oklahoma City-Shawnee, OK 416 | Central | metro county (urban) | mining-dependent | https://maps.google.com/?q=LoganCounty+OK |
| | | McClain County | OK | 40087 | | Oklahoma City, OK 36420 | Oklahoma City-Shawnee, OK 416 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=McClainCounty+OK |
