| | Nolan County | TX | 48353 | | Sweetwater, TX 45020 | Abilene-Sweetwater, TX 101 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=NolanCounty+TX |
| | Nueces County | TX | 48355 | | Corpus Christi, TX 18580 | Corpus
Christi-Kingsville-Alice,
TX 204 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=NuecesCounty+TX |
| | Parker County | TX | 48367 | Fort
Worth-Arlington-Grapevine,
TX 23104 | Dallas-Fort
Worth-Arlington, TX 19100 | Dallas-Fort Worth, TX-OK 206 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=ParkerCounty+TX |
| | Polk County | TX | 48373 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=PolkCounty+TX |
| | Potter County | TX | 48375 | | Amarillo, TX 11100 | Amarillo-Borger, TX 108 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=PotterCounty+TX |
| | Rains County | TX | 48379 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=RainsCounty+TX |
| | Randall County | TX | 48381 | | Amarillo, TX 11100 | Amarillo-Borger, TX 108 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=RandallCounty+TX |
| | Roberts County | TX | 48393 | | Pampa, TX 37420 | | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=RobertsCounty+TX |
| | Rockwall County | TX | 48397 | Dallas-Plano-Irving, TX 19124 | Dallas-Fort
Worth-Arlington, TX 19100 | Dallas-Fort Worth, TX-OK 206 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=RockwallCounty+TX |
| | San Augustine County | TX | 48405 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=SanAugustineCounty+TX |