| | Brazoria County | TX | 48039 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=BrazoriaCounty+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 |
| | Harris County | TX | 48201 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Central | metro county (urban) | mining-dependent | https://maps.google.com/?q=HarrisCounty+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 |
| | Walker County | TX | 48471 | | Huntsville, TX 26660 | Houston-Pasadena, TX 288 | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=WalkerCounty+TX |
| | Waller County | TX | 48473 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=WallerCounty+TX |
| | Washington County | TX | 48477 | | Brenham, TX 14780 | Houston-Pasadena, TX 288 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=WashingtonCounty+TX |
| | Wharton County | TX | 48481 | | El Campo, TX 20900 | Houston-Pasadena, TX 288 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=WhartonCounty+TX |
| | Austin County | TX | 48015 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Outlying | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=AustinCounty+TX |
| | Chambers County | TX | 48071 | | Houston-Pasadena-The
Woodlands, TX 26420 | Houston-Pasadena, TX 288 | Outlying | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=ChambersCounty+TX |