| | | Sherman County | TX | 48421 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ShermanCounty+TX |
| | | Smith County | TX | 48423 | | Tyler, TX 46340 | Tyler-Jacksonville, TX 540 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SmithCounty+TX |
| | | Somervell County | TX | 48425 | | | | | metro county (urban) | nonspecialized | https://maps.google.com/?q=SomervellCounty+TX |
| | | Starr County | TX | 48427 | | Rio Grande City-Roma, TX 40100 | McAllen-Edinburg, TX 365 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=StarrCounty+TX |
| | | Stephens County | TX | 48429 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=StephensCounty+TX |
| | | Sterling County | TX | 48431 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=SterlingCounty+TX |
| | | Stonewall County | TX | 48433 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=StonewallCounty+TX |
| | | Sutton County | TX | 48435 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=SuttonCounty+TX |
| | | Swisher County | TX | 48437 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=SwisherCounty+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 |
