| | | Jasper County | TX | 48241 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=JasperCounty+TX |
| | | Jeff Davis County | TX | 48243 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=JeffDavisCounty+TX |
| | | Jefferson County | TX | 48245 | | Beaumont-Port Arthur, TX 13140 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=JeffersonCounty+TX |
| | | Jim Hogg County | TX | 48247 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=JimHoggCounty+TX |
| | | Jim Wells County | TX | 48249 | | Alice, TX 10860 | Corpus
Christi-Kingsville-Alice,
TX 204 | Central | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=JimWellsCounty+TX |
| | | Johnson County | TX | 48251 | 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=JohnsonCounty+TX |
| | | Jones County | TX | 48253 | | Abilene, TX 10180 | Abilene-Sweetwater, TX 101 | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=JonesCounty+TX |
| | | Karnes County | TX | 48255 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=KarnesCounty+TX |
| | | Kaufman County | TX | 48257 | Dallas-Plano-Irving, TX 19124 | Dallas-Fort
Worth-Arlington, TX 19100 | Dallas-Fort Worth, TX-OK 206 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=KaufmanCounty+TX |
| | | Kendall County | TX | 48259 | | San Antonio-New
Braunfels, TX 41700 | San Antonio-New
Braunfels-Kerrville, TX 484 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=KendallCounty+TX |
