| | | Moore County | TX | 48341 | | Dumas, TX 20300 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MooreCounty+TX |
| | | Morris County | TX | 48343 | | Mount Pleasant, TX 34420 | | Outlying | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MorrisCounty+TX |
| | | Motley County | TX | 48345 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=MotleyCounty+TX |
| | | Nacogdoches County | TX | 48347 | | Nacogdoches, TX 34860 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=NacogdochesCounty+TX |
| | | Navarro County | TX | 48349 | | Corsicana, TX 18620 | Dallas-Fort Worth, TX-OK 206 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=NavarroCounty+TX |
| | | Newton County | TX | 48351 | | | | | metro county (urban) | nonspecialized | https://maps.google.com/?q=NewtonCounty+TX |
| | | Nolan County | TX | 48353 | | Sweetwater, TX 45020 | Abilene-Sweetwater, TX 101 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=NolanCounty+TX |
| | | Nueces County | TX | 48355 | | Corpus Christi, TX 18580 | Corpus
Christi-Kingsville-Alice,
TX 204 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=NuecesCounty+TX |
| | | Ochiltree County | TX | 48357 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=OchiltreeCounty+TX |
| | | Oldham County | TX | 48359 | | Amarillo, TX 11100 | Amarillo-Borger, TX 108 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=OldhamCounty+TX |
