| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | Dan HamburgDEM | DEM | 251,206 | 47.6% | D+2.5 |
| CA-02 | Wally HergerREP | REP | 256,556 | 65.2% | R+37.2 |
| CA-03 | Vic FazioDEM | DEM | 238,685 | 51.2% | D+10.9 |
| CA-04 | REP | 283,365 | 49.8% | R+4.1 | |
| CA-05 | DEM | 230,560 | 68.6% | D+43.2 | |
| CA-06 | DEM | 291,786 | 65.2% | D+31.6 | |
| CA-07 | DEM | 217,982 | 70.3% | D+45.2 | |
| CA-08 | Nancy PelosiDEM | DEM | 232,691 | 82.5% | D+71.4 |
| CA-09 | DEM | 228,467 | 71.9% | D+48.4 | |
| CA-10 | REP | 280,429 | 52.0% | R+4.0 | |
| CA-11 | REP | 198,490 | 47.6% | R+2.0 | |
| CA-12 | Tom LantosDEM | DEM | 228,407 | 68.8% | D+45.5 |
| CA-13 | DEM | 205,516 | 60.2% | D+28.6 | |
| CA-14 | Anna G EshooDEM | DEM | 259,222 | 56.7% | D+17.6 |
| CA-15 | DEM | 265,370 | 63.5% | D+32.3 | |
| CA-16 | Don EdwardsDEM | DEM | 155,883 | 62.0% | D+30.0 |
| CA-17 | DEM | 210,367 | 72.0% | D+48.3 | |
| CA-18 | DEM | 165,011 | 84.7% | D+84.7 | |
| CA-19 | DEM | 216,640 | 46.9% | D+0.5 | |
| CA-20 | DEM | 112,067 | 64.8% | D+29.7 | |
| CA-21 | REP | 195,965 | 65.2% | R+30.5 | |
| CA-22 | REP | 249,926 | 52.5% | R+17.6 | |
| CA-23 | REP | 212,881 | 54.3% | R+12.8 | |
| CA-24 | DEM | 255,267 | 55.5% | D+16.4 | |
| CA-25 | REP | 218,715 | 51.9% | R+18.9 | |
| CA-26 | DEM | 120,908 | 61.0% | D+30.9 | |
| CA-27 | REP | 212,450 | 49.7% | R+10.2 | |
| CA-28 | David DreierREP | REP | 209,382 | 58.4% | R+21.9 |
| CA-29 | DEM | 261,486 | 61.3% | D+35.6 | |
| CA-30 | DEM | 83,543 | 58.4% | D+34.4 | |
| CA-31 | DEM | 109,197 | 62.6% | D+25.1 | |
| CA-32 | DEM | 172,812 | 87.2% | D+87.2 | |
| CA-33 | DEM | 50,779 | 63.0% | D+32.7 | |
| CA-34 | DEM | 149,718 | 61.3% | D+27.3 | |
| CA-35 | DEM | 124,776 | 82.5% | D+68.5 | |
| CA-36 | Jane HarmanDEM | DEM | 351,397 | 35.8% | D+4.6 |
| CA-37 | DEM | 113,337 | 85.7% | D+85.7 | |
| CA-38 | Stephen HornREP | REP | 189,321 | 48.6% | R+5.3 |
| CA-39 | REP | 213,684 | 57.3% | R+19.1 | |
| CA-40 | Jerry LewisREP | REP | 205,283 | 63.1% | R+32.0 |
| CA-41 | Jay KimREP | REP | 170,666 | 59.6% | R+25.2 |
| CA-42 | DEM | 157,455 | 50.7% | D+6.7 | |
| CA-43 | Ken CalvertREP | REP | 190,639 | 46.7% | R+0.3 |
| CA-44 | REP | 203,541 | 54.2% | R+14.1 | |
| CA-45 | REP | 227,016 | 54.5% | R+15.5 | |
| CA-46 | REP | 110,806 | 50.2% | R+9.2 | |
| CA-47 | REP | 254,257 | 64.9% | R+34.6 | |
| CA-48 | Ron PackardREP | REP | 230,495 | 61.1% | R+31.9 |
| CA-49 | Lynn SchenkDEM | DEM | 248,898 | 51.1% | D+8.5 |
| CA-50 | Bob FilnerDEM | DEM | 136,626 | 56.6% | D+27.6 |
| CA-51 | REP | 252,995 | 56.1% | R+22.4 | |
| CA-52 | REP | 213,784 | 52.9% | R+11.7 |