| | Red River County | TX | 48387 | | Paris, TX 37580 | | Outlying | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=RedRiverCounty+TX |
| | Real County | TX | 48385 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=RealCounty+TX |
| | Reagan County | TX | 48383 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=ReaganCounty+TX |
| | Randall County | TX | 48381 | | Amarillo, TX 11100 | Amarillo-Borger, TX 108 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=RandallCounty+TX |
| | Rains County | TX | 48379 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=RainsCounty+TX |
| | Presidio County | TX | 48377 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=PresidioCounty+TX |
| | Potter County | TX | 48375 | | Amarillo, TX 11100 | Amarillo-Borger, TX 108 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=PotterCounty+TX |
| | Polk County | TX | 48373 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=PolkCounty+TX |
| | Pecos County | TX | 48371 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=PecosCounty+TX |
| | Parmer County | TX | 48369 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ParmerCounty+TX |