| | | Lubbock County | TX | 48303 | | Lubbock, TX 31180 | Lubbock-Plainview, TX 352 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LubbockCounty+TX |
| | | Lynn County | TX | 48305 | | Lubbock, TX 31180 | Lubbock-Plainview, TX 352 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=LynnCounty+TX |
| | | McLennan County | TX | 48309 | | Waco, TX 47380 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=McLennanCounty+TX |
| | | Martin County | TX | 48317 | | Midland, TX 33260 | Midland-Odessa-Andrews,
TX 372 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=MartinCounty+TX |
| | | Medina County | TX | 48325 | | San Antonio-New
Braunfels, TX 41700 | San Antonio-New
Braunfels-Kerrville, TX 484 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=MedinaCounty+TX |
| | | Midland County | TX | 48329 | | Midland, TX 33260 | Midland-Odessa-Andrews,
TX 372 | Central | metro county (urban) | mining-dependent | https://maps.google.com/?q=MidlandCounty+TX |
| | | Montgomery County | TX | 48339 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=MontgomeryCounty+TX |
| | | Newton County | TX | 48351 | | | | | metro county (urban) | nonspecialized | https://maps.google.com/?q=NewtonCounty+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 |
| | | Oldham County | TX | 48359 | | Amarillo, TX 11100 | Amarillo-Borger, TX 108 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=OldhamCounty+TX |
