| | Cass County | TX | 48067 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CassCounty+TX |
| | Castro County | TX | 48069 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CastroCounty+TX |
| | Childress County | TX | 48075 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=ChildressCounty+TX |
| | Clay County | TX | 48077 | | Wichita Falls, TX 48660 | | Outlying | metro county (urban) | mining-dependent | https://maps.google.com/?q=ClayCounty+TX |
| | Coke County | TX | 48081 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=CokeCounty+TX |
| | Coleman County | TX | 48083 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ColemanCounty+TX |
| | Collingsworth County | TX | 48087 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CollingsworthCounty+TX |
| | Colorado County | TX | 48089 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ColoradoCounty+TX |
| | Comanche County | TX | 48093 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ComancheCounty+TX |
| | Concho County | TX | 48095 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ConchoCounty+TX |