| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | DEM | 204,759 | 67.5% | D+40.9 | |
| CA-02 | Wally HergerREP | REP | 188,414 | 58.3% | R+18.7 |
| CA-03 | DEM | 208,974 | 76.0% | D+51.9 | |
| CA-04 | Vic FazioDEM | DEM | 182,960 | 70.2% | D+40.3 |
| CA-05 | Sala BurtonDEM | DEM | 163,214 | 75.2% | D+53.1 |
| CA-06 | DEM | 193,552 | 73.8% | D+47.7 | |
| CA-07 | DEM | 186,553 | 66.6% | D+33.1 | |
| CA-08 | DEM | 202,935 | 60.0% | D+22.1 | |
| CA-09 | DEM | 208,409 | 54.5% | D+52.7 | |
| CA-10 | Don EdwardsDEM | DEM | 119,564 | 70.5% | D+43.8 |
| CA-11 | Tom LantosDEM | DEM | 151,695 | 74.1% | D+48.2 |
| CA-12 | REP | 187,043 | 59.5% | R+22.3 | |
| CA-13 | DEM | 154,450 | 69.7% | D+39.5 | |
| CA-14 | REP | 205,161 | 71.6% | R+45.5 | |
| CA-15 | Tony CoelhoDEM | DEM | 131,775 | 71.0% | D+43.9 |
| CA-16 | DEM | 163,498 | 78.4% | D+59.2 | |
| CA-17 | REP | 147,469 | 60.2% | R+20.4 | |
| CA-18 | DEM | 142,387 | 71.3% | D+42.5 | |
| CA-19 | REP | 124,919 | 98.1% | R+98.1 | |
| CA-20 | REP | 179,016 | 72.6% | R+45.2 | |
| CA-21 | REP | 193,091 | 68.4% | R+40.2 | |
| CA-22 | REP | 191,176 | 73.8% | R+50.8 | |
| CA-23 | DEM | 184,754 | 65.8% | D+34.0 | |
| CA-24 | DEM | 118,173 | 87.9% | D+87.9 | |
| CA-25 | DEM | 82,413 | 76.1% | D+54.8 | |
| CA-26 | DEM | 150,753 | 65.1% | D+30.1 | |
| CA-27 | Mel LevineDEM | DEM | 173,320 | 63.7% | D+29.4 |
| CA-28 | DEM | 121,330 | 76.3% | D+55.0 | |
| CA-29 | DEM | 92,415 | 84.5% | D+70.0 | |
| CA-30 | DEM | 94,985 | 62.5% | D+27.0 | |
| CA-31 | DEM | 109,781 | 70.3% | D+42.6 | |
| CA-32 | DEM | 132,541 | 68.5% | D+39.0 | |
| CA-33 | David DreierREP | REP | 165,353 | 71.7% | R+44.9 |
| CA-34 | DEM | 110,063 | 60.3% | D+20.7 | |
| CA-35 | Jerry LewisREP | REP | 165,557 | 76.8% | R+53.7 |
| CA-36 | DEM | 136,778 | 57.1% | D+14.2 | |
| CA-37 | REP | 192,224 | 63.7% | R+27.4 | |
| CA-38 | REP | 119,464 | 55.3% | R+12.9 | |
| CA-39 | REP | 176,732 | 74.5% | R+50.5 | |
| CA-40 | REP | 200,518 | 59.8% | R+22.0 | |
| CA-41 | Bill LoweryREP | REP | 196,923 | 67.8% | R+37.5 |
| CA-42 | REP | 192,711 | 72.8% | R+48.1 | |
| CA-43 | Ron PackardREP | REP | 187,789 | 73.1% | R+49.1 |
| CA-44 | Jim BatesDEM | DEM | 109,836 | 64.2% | D+31.1 |
| CA-45 | REP | 154,675 | 76.9% | R+55.7 |