| | Anderson County | TX | 48001 | | Palestine, TX 37300 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=AndersonCounty+TX |
| | Andrews County | TX | 48003 | | Andrews, TX 11380 | Midland-Odessa-Andrews,
TX 372 | Central | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=AndrewsCounty+TX |
| | Angelina County | TX | 48005 | | Lufkin, TX 31260 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=AngelinaCounty+TX |
| | Bailey County | TX | 48017 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BaileyCounty+TX |
| | Baylor County | TX | 48023 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=BaylorCounty+TX |
| | Bee County | TX | 48025 | | Beeville, TX 13300 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=BeeCounty+TX |
| | Blanco County | TX | 48031 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=BlancoCounty+TX |
| | Borden County | TX | 48033 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BordenCounty+TX |
| | Bosque County | TX | 48035 | | Waco, TX 47380 | | Outlying | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BosqueCounty+TX |
| | Brewster County | TX | 48043 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=BrewsterCounty+TX |