| | Fayette County | TX | 48149 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=FayetteCounty+TX |
| | Fisher County | TX | 48151 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=FisherCounty+TX |
| | Floyd County | TX | 48153 | | Plainview, TX 38380 | Lubbock-Plainview, TX 352 | Outlying | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=FloydCounty+TX |
| | Foard County | TX | 48155 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=FoardCounty+TX |
| | Fort Bend County | TX | 48157 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=FortBendCounty+TX |
| | Franklin County | TX | 48159 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FranklinCounty+TX |
| | Freestone County | TX | 48161 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=FreestoneCounty+TX |
| | Frio County | TX | 48163 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=FrioCounty+Texas |
| | Gaines County | TX | 48165 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=GainesCounty+TX |
| | Galveston County | TX | 48167 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=GalvestonCounty+TX |