| District ID | 21st District |
| Representative | Chip Roy |
| Party Affiliation | Republican |
| Partisan Voting Index (PVI) | R+10 |
| 78885 |
| 78884 |
| 78883 |
| 78880 |
| 78879 |
| 78873 |
| 78833 |
| 78828 |
| 78801 |
| 78737 |
| 78736 |
| 78735 |
| 78676 |
| 78675 |
| 78671 |
| 78669 |
| 78666 |
| 78663 |
| 78652 |
| 78640 |
| 78636 |
| 78635 |
| 78631 |
| 78624 |
| 78623 |
| 78620 |
| 78619 |
| 78618 |
| 78610 |
| 78606 |
| 78266 |
| 78261 |
| 78259 |
| 78258 |
| 78248 |
| 78247 |
| 78239 |
| 78234 |
| 78233 |
| 78232 |
| 78231 |
| 78230 |
| 78218 |
| 78217 |
| 78216 |
| 78213 |
| 78212 |
| 78209 |
| 78163 |
| 78154 |
| 78133 |
| 78132 |
| 78130 |
| 78070 |
| 78063 |
| 78058 |
| 78055 |
| 78028 |
| 78027 |
| 78025 |
| 78024 |
| 78023 |
| 78015 |
| 78013 |
| 78010 |
| 78006 |
| 78004 |
| 78003 |
| 76849 |