| | Throckmorton County | TX | 48447 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ThrockmortonCounty+TX |
| | Terry County | TX | 48445 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=TerryCounty+TX |
| | Terrell County | TX | 48443 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=TerrellCounty+TX |
| | Taylor County | TX | 48441 | | Abilene, TX 10180 | Abilene-Sweetwater, TX 101 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=TaylorCounty+TX |
| | Tarrant County | TX | 48439 | Fort
Worth-Arlington-Grapevine,
TX 23104 | Dallas-Fort
Worth-Arlington, TX 19100 | Dallas-Fort Worth, TX-OK 206 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=TarrantCounty+TX |
| | Swisher County | TX | 48437 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=SwisherCounty+TX |
| | Sutton County | TX | 48435 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=SuttonCounty+TX |
| | Stonewall County | TX | 48433 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=StonewallCounty+TX |
| | Sterling County | TX | 48431 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=SterlingCounty+TX |
| | Stephens County | TX | 48429 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=StephensCounty+TX |