| District ID | 18th District |
| Representative | Sheila Jackson Lee |
| Party Affiliation | Democrat |
| Partisan Voting Index (PVI) | D+27 |
| 77396 |
| 77346 |
| 77338 |
| 77204 |
| 77093 |
| 77092 |
| 77091 |
| 77090 |
| 77088 |
| 77086 |
| 77080 |
| 77078 |
| 77073 |
| 77070 |
| 77067 |
| 77066 |
| 77064 |
| 77060 |
| 77055 |
| 77054 |
| 77050 |
| 77041 |
| 77040 |
| 77039 |
| 77032 |
| 77029 |
| 77028 |
| 77026 |
| 77022 |
| 77021 |
| 77020 |
| 77019 |
| 77018 |
| 77016 |
| 77014 |
| 77010 |
| 77009 |
| 77008 |
| 77007 |
| 77004 |
| 77003 |
| 77002 |