| | Dickens County | TX | 48125 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=DickensCounty+TX |
| | Dimmit County | TX | 48127 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=DimmitCounty+TX |
| | Donley County | TX | 48129 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=DonleyCounty+TX |
| | Duval County | TX | 48131 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=DuvalCounty+TX |
| | Eastland County | TX | 48133 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=EastlandCounty+TX |
| | Edwards County | TX | 48137 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=EdwardsCounty+TX |
| | Erath County | TX | 48143 | | Stephenville, TX 44500 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=ErathCounty+TX |
| | Falls County | TX | 48145 | | Waco, TX 47380 | | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=FallsCounty+TX |
| | 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 |