| | | Brazoria County | TX | 48039 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=BrazoriaCounty+TX |
| | | Brazos County | TX | 48041 | | College Station-Bryan, TX 17780 | | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=BrazosCounty+TX |
| | | Burleson County | TX | 48051 | | College Station-Bryan, TX 17780 | | Outlying | metro county (urban) | mining-dependent | https://maps.google.com/?q=BurlesonCounty+TX |
| | | Caldwell County | TX | 48055 | | Austin-Round Rock-San
Marcos, TX 12420 | | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=CaldwellCounty+TX |
| | | Callahan County | TX | 48059 | | Abilene, TX 10180 | Abilene-Sweetwater, TX 101 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=CallahanCounty+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 |
| | | Carson County | TX | 48065 | | Amarillo, TX 11100 | Amarillo-Borger, TX 108 | Outlying | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=CarsonCounty+TX |
| | | Chambers County | TX | 48071 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Outlying | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=ChambersCounty+TX |
| | | Clay County | TX | 48077 | | Wichita Falls, TX 48660 | | Outlying | metro county (urban) | mining-dependent | https://maps.google.com/?q=ClayCounty+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 |
