| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | DEM | 218,044 | 66.2% | D+37.3 | |
| CA-02 | Wally HergerREP | REP | 210,202 | 64.2% | R+31.7 |
| CA-03 | REP | 228,169 | 59.5% | R+21.6 | |
| CA-04 | REP | 276,893 | 49.0% | R+3.2 | |
| CA-05 | DEM | 149,266 | 70.8% | D+47.3 | |
| CA-06 | DEM | 246,628 | 70.2% | D+44.1 | |
| CA-07 | DEM | 140,486 | 84.0% | D+84.0 | |
| CA-08 | Nancy PelosiDEM | DEM | 184,639 | 80.4% | D+69.7 |
| CA-09 | Barbara LeeDEM | DEM | 193,686 | 86.3% | D+75.6 |
| CA-10 | DEM | 196,978 | 66.4% | D+32.9 | |
| CA-11 | DEM | 206,264 | 53.3% | D+6.5 | |
| CA-12 | Tom LantosDEM | DEM | 182,324 | 76.0% | D+52.1 |
| CA-13 | DEM | 147,897 | 74.9% | D+49.8 | |
| CA-14 | Anna G EshooDEM | DEM | 198,575 | 71.1% | D+46.9 |
| CA-15 | DEM | 159,718 | 72.3% | D+44.7 | |
| CA-16 | Zoe LofgrenDEM | DEM | 136,059 | 72.7% | D+45.4 |
| CA-17 | Sam FarrDEM | DEM | 159,293 | 75.8% | D+53.3 |
| CA-18 | DEM | 108,713 | 65.5% | D+30.9 | |
| CA-19 | REP | 181,994 | 60.6% | R+21.1 | |
| CA-20 | Jim CostaDEM | DEM | 61,120 | 100.0% | D+100.0 |
| CA-21 | REP | 142,661 | 66.7% | R+36.8 | |
| CA-22 | REP | 188,504 | 70.7% | R+41.4 | |
| CA-23 | Lois CappsDEM | DEM | 175,933 | 65.2% | D+30.4 |
| CA-24 | REP | 209,292 | 62.0% | R+24.1 | |
| CA-25 | REP | 156,773 | 60.0% | R+24.3 | |
| CA-26 | David DreierREP | REP | 179,144 | 57.0% | R+19.1 |
| CA-27 | Brad ShermanDEM | DEM | 134,724 | 68.8% | D+37.5 |
| CA-28 | DEM | 108,042 | 73.9% | D+54.8 | |
| CA-29 | DEM | 143,389 | 63.5% | D+36.0 | |
| CA-30 | DEM | 211,734 | 71.5% | D+45.0 | |
| CA-31 | DEM | 64,952 | 100.0% | D+100.0 | |
| CA-32 | DEM | 91,686 | 83.0% | D+83.0 | |
| CA-33 | DEM | 113,715 | 100.0% | D+100.0 | |
| CA-34 | DEM | 74,819 | 76.8% | D+53.6 | |
| CA-35 | DEM | 98,506 | 83.8% | D+83.8 | |
| CA-36 | Jane HarmanDEM | DEM | 166,153 | 63.4% | D+31.4 |
| CA-37 | DEM | 97,962 | 82.4% | D+82.4 | |
| CA-38 | DEM | 99,801 | 75.3% | D+50.7 | |
| CA-39 | DEM | 109,533 | 65.9% | D+31.7 | |
| CA-40 | REP | 151,289 | 66.8% | R+36.1 | |
| CA-41 | Jerry LewisREP | REP | 164,044 | 66.9% | R+33.9 |
| CA-42 | REP | 129,720 | 100.0% | R+100.0 | |
| CA-43 | Joe BacaDEM | DEM | 81,860 | 64.5% | D+29.0 |
| CA-44 | Ken CalvertREP | REP | 149,316 | 60.0% | R+23.0 |
| CA-45 | Mary BonoREP | REP | 164,251 | 60.7% | R+21.3 |
| CA-46 | REP | 195,052 | 59.6% | R+22.9 | |
| CA-47 | DEM | 75,619 | 62.3% | D+24.7 | |
| CA-48 | REP | 200,527 | 59.9% | R+22.7 | |
| CA-49 | REP | 156,137 | 63.3% | R+29.9 | |
| CA-50 | REP | 222,102 | 53.1% | R+9.6 | |
| CA-51 | Bob FilnerDEM | DEM | 115,839 | 67.4% | D+37.3 |
| CA-52 | REP | 191,369 | 64.6% | R+32.6 | |
| CA-53 | DEM | 144,387 | 67.6% | D+37.6 |