| | | Loving County | TX | 48301 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=LovingCounty+TX |
| | | Lubbock County | TX | 48303 | | Lubbock, TX 31180 | Lubbock-Plainview, TX 352 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LubbockCounty+TX |
| | | Lynn County | TX | 48305 | | Lubbock, TX 31180 | Lubbock-Plainview, TX 352 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=LynnCounty+TX |
| | | Madison County | TX | 48313 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=MadisonCounty+TX |
| | | Marion County | TX | 48315 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MarionCounty+TX |
| | | Martin County | TX | 48317 | | Midland, TX 33260 | Midland-Odessa-Andrews,
TX 372 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=MartinCounty+TX |
| | | Mason County | TX | 48319 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=MasonCounty+TX |
| | | Matagorda County | TX | 48321 | | Bay City, TX 13060 | Houston-Pasadena, TX 288 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MatagordaCounty+TX |
| | | Maverick County | TX | 48323 | | Eagle Pass, TX 20580 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=MaverickCounty+TX |
| | | McCulloch County | TX | 48307 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=McCullochCounty+TX |
