| | 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 |
| | 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 |
| | Brewster County | TX | 48043 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=BrewsterCounty+TX |
| | Briscoe County | TX | 48045 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BriscoeCounty+TX |
| | Burnet County | TX | 48053 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=BurnetCounty+TX |
| | Cass County | TX | 48067 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CassCounty+TX |
| | Castro County | TX | 48069 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CastroCounty+TX |
| | Childress County | TX | 48075 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=ChildressCounty+TX |