| | | Bosque County | TX | 48035 | | Waco, TX 47380 | | Outlying | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BosqueCounty+TX |
| | | Bowie County | TX | 48037 | | Texarkana, TX-AR 45500 | | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=BowieCounty+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 |
| | | 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 |
| | | Brown County | TX | 48049 | | Brownwood, TX 15220 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=BrownCounty+TX |
| | | Burleson County | TX | 48051 | | College Station-Bryan, TX 17780 | | Outlying | metro county (urban) | mining-dependent | https://maps.google.com/?q=BurlesonCounty+TX |
| | | Burnet County | TX | 48053 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=BurnetCounty+TX |
| | | Caldwell County | TX | 48055 | | Austin-Round Rock-San
Marcos, TX 12420 | | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=CaldwellCounty+TX |
| | | Camp County | TX | 48063 | | Mount Pleasant, TX 34420 | | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CampCounty+TX |
