City levels are determined by the county in which they are located. If the city is not named below, it may be located within a county listed below. Visit the National Association of Counties website and type the city name into the "City/Zip Search" tab to determine the city's county. If the city is not listed below or is not located in a county below, that city is a Level 1.
| Level | City | County |
|---|---|---|
| 3 | Arlington / Fort Worth / Grapevine | Tarrant County / City of Grapevine |
| 3 | Austin | Travis |
| 3 | Dallas | Dallas |
| 2 | Galveston | Galveston |
| 3 | Houston (Johnson Space Center) | Montgomery / Fort Bend / Harris |
| 2 | Midland / Odessa | Midland / Andrews / Ector / Martin |
| 2 | Pecos | Reeves |
| 3 | Plano | Collin |
| 2 | San Antonio | Bexar |
| 2 | South Padre Island | Cameron |