| District ID | 30th District |
| Representative | Adam Schiff |
| Party Affiliation | Democrat |
| Partisan Voting Index (PVI) | D+18 |
| 90004 |
| 90012 |
| 90020 |
| 90026 |
| 90027 |
| 90028 |
| 90029 |
| 90036 |
| 90038 |
| 90039 |
| 90041 |
| 90046 |
| 90048 |
| 90068 |
| 90069 |
| 90210 |
| 90211 |
| 91011 |
| 91020 |
| 91040 |
| 91042 |
| 91046 |
| 91103 |
| 91105 |
| 91201 |
| 91202 |
| 91203 |
| 91204 |
| 91205 |
| 91206 |
| 91207 |
| 91208 |
| 91210 |
| 91214 |
| 91342 |
| 91352 |
| 91501 |
| 91502 |
| 91504 |
| 91505 |
| 91506 |
| 91521 |
| 91522 |
| 91523 |
| 91604 |
| 91608 |
| 93510 |