| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | DEM | 290,472 | 68.1% | D+44.7 | |
| CA-02 | Wally HergerREP | REP | 282,337 | 57.9% | R+15.8 |
| CA-03 | REP | 314,046 | 49.5% | R+5.6 | |
| CA-04 | REP | 369,780 | 50.2% | R+0.5 | |
| CA-05 | DEM | 221,155 | 74.3% | D+53.5 | |
| CA-06 | DEM | 320,362 | 71.7% | D+47.6 | |
| CA-07 | DEM | 234,773 | 72.8% | D+51.0 | |
| CA-08 | Nancy PelosiDEM | DEM | 285,247 | 71.9% | D+62.2 |
| CA-09 | Barbara LeeDEM | DEM | 277,600 | 86.1% | D+76.4 |
| CA-10 | DEM | 295,165 | 65.1% | D+34.0 | |
| CA-11 | DEM | 297,616 | 55.3% | D+10.6 | |
| CA-12 | DEM | 266,853 | 75.1% | D+56.6 | |
| CA-13 | DEM | 218,276 | 76.4% | D+52.9 | |
| CA-14 | Anna G EshooDEM | DEM | 272,766 | 69.8% | D+47.5 |
| CA-15 | DEM | 238,589 | 71.7% | D+48.4 | |
| CA-16 | Zoe LofgrenDEM | DEM | 205,327 | 71.3% | D+47.3 |
| CA-17 | Sam FarrDEM | DEM | 228,626 | 73.9% | D+48.1 |
| CA-18 | DEM | 130,192 | 100.0% | D+100.0 | |
| CA-19 | REP | 182,101 | 98.4% | R+98.4 | |
| CA-20 | Jim CostaDEM | DEM | 125,141 | 74.3% | D+48.7 |
| CA-21 | REP | 209,815 | 68.4% | R+36.8 | |
| CA-22 | REP | 224,549 | 100.0% | R+100.0 | |
| CA-23 | Lois CappsDEM | DEM | 251,788 | 68.1% | D+36.1 |
| CA-24 | REP | 300,052 | 58.1% | R+16.3 | |
| CA-25 | REP | 250,589 | 57.7% | R+15.5 | |
| CA-26 | David DreierREP | REP | 267,130 | 52.6% | R+12.2 |
| CA-27 | Brad ShermanDEM | DEM | 212,835 | 68.5% | D+43.7 |
| CA-28 | DEM | 137,621 | 99.9% | D+99.9 | |
| CA-29 | DEM | 212,144 | 68.9% | D+42.2 | |
| CA-30 | DEM | 242,792 | 100.0% | D+100.0 | |
| CA-31 | DEM | 110,955 | 100.0% | D+100.0 | |
| CA-32 | DEM | 130,150 | 100.0% | D+100.0 | |
| CA-33 | DEM | 213,460 | 87.6% | D+75.1 | |
| CA-34 | DEM | 127,769 | 77.1% | D+54.2 | |
| CA-35 | DEM | 182,579 | 82.6% | D+69.3 | |
| CA-36 | Jane HarmanDEM | DEM | 250,491 | 68.6% | D+37.3 |
| CA-37 | DEM | 175,252 | 74.9% | D+74.9 | |
| CA-38 | DEM | 159,324 | 81.7% | D+81.7 | |
| CA-39 | DEM | 179,822 | 69.7% | D+39.4 | |
| CA-40 | REP | 231,695 | 62.5% | R+25.1 | |
| CA-41 | Jerry LewisREP | REP | 258,700 | 61.6% | R+23.3 |
| CA-42 | REP | 263,313 | 60.2% | R+20.3 | |
| CA-43 | Joe BacaDEM | DEM | 156,571 | 69.1% | D+38.3 |
| CA-44 | Ken CalvertREP | REP | 253,827 | 51.2% | R+2.4 |
| CA-45 | REP | 266,192 | 58.3% | R+16.6 | |
| CA-46 | REP | 285,277 | 52.5% | R+9.4 | |
| CA-47 | DEM | 123,584 | 69.5% | D+44.1 | |
| CA-48 | REP | 308,702 | 55.6% | R+14.9 | |
| CA-49 | REP | 240,670 | 58.3% | R+20.8 | |
| CA-50 | REP | 313,502 | 50.2% | R+5.1 | |
| CA-51 | Bob FilnerDEM | DEM | 203,825 | 72.8% | D+48.5 |
| CA-52 | REP | 285,138 | 56.4% | R+17.4 | |
| CA-53 | DEM | 235,542 | 68.5% | D+41.0 |