| | | Brazos County | TX | 48041 | | College Station-Bryan, TX 17780 | | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=BrazosCounty+TX |
| | | Brown County | TX | 48049 | | Brownwood, TX 15220 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=BrownCounty+TX |
| | | Calhoun County | TX | 48057 | | Port Lavaca, TX 38920 | Victoria-Port Lavaca, TX 544 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=CalhounCounty+TX |
| | | Cameron County | TX | 48061 | | Brownsville-Harlingen, TX 15180 | Brownsville-Harlingen-Raymondville,
TX 154 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=CameronCounty+TX |
| | | Cherokee County | TX | 48073 | | Jacksonville, TX 27380 | Tyler-Jacksonville, TX 540 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CherokeeCounty+TX |
| | | Collin County | TX | 48085 | 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=CollinCounty+TX |
| | | Cooke County | TX | 48097 | | Gainesville, TX 23620 | Dallas-Fort Worth, TX-OK 206 | Central | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=CookeCounty+TX |
| | | Coryell County | TX | 48099 | | Killeen-Temple, TX 28660 | | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=CoryellCounty+TX |
| | | Dallas County | TX | 48113 | 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=DallasCounty+TX |
| | | Deaf Smith County | TX | 48117 | | Hereford, TX 25820 | | Central | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=DeafSmithCounty+TX |
