| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | DEM | 254,154 | 62.9% | D+34.5 | |
| CA-02 | Wally HergerREP | REP | 236,351 | 58.8% | R+20.3 |
| CA-03 | DEM | 257,766 | 71.2% | D+42.4 | |
| CA-04 | Vic FazioDEM | DEM | 182,490 | 99.3% | D+99.3 |
| CA-05 | Nancy PelosiDEM | DEM | 174,758 | 76.4% | D+57.1 |
| CA-06 | DEM | 240,819 | 73.3% | D+46.7 | |
| CA-07 | DEM | 248,484 | 68.4% | D+36.8 | |
| CA-08 | DEM | 245,196 | 66.6% | D+35.4 | |
| CA-09 | DEM | 209,522 | 73.0% | D+45.9 | |
| CA-10 | Don EdwardsDEM | DEM | 165,301 | 86.2% | D+86.2 |
| CA-11 | Tom LantosDEM | DEM | 205,016 | 71.0% | D+46.5 |
| CA-12 | REP | 263,930 | 51.7% | R+5.6 | |
| CA-13 | DEM | 214,522 | 67.1% | D+37.3 | |
| CA-14 | REP | 277,775 | 62.6% | R+25.2 | |
| CA-15 | Tony CoelhoDEM | DEM | 170,193 | 69.8% | D+41.6 |
| CA-16 | DEM | 225,827 | 78.6% | D+57.2 | |
| CA-17 | REP | 181,298 | 71.5% | R+42.9 | |
| CA-18 | DEM | 179,749 | 69.9% | D+39.9 | |
| CA-19 | REP | 230,924 | 50.2% | R+1.7 | |
| CA-20 | REP | 229,006 | 71.1% | R+44.0 | |
| CA-21 | REP | 262,671 | 69.1% | R+40.2 | |
| CA-22 | REP | 236,811 | 69.5% | R+43.6 | |
| CA-23 | DEM | 232,879 | 63.5% | D+30.4 | |
| CA-24 | DEM | 155,071 | 72.3% | D+48.5 | |
| CA-25 | DEM | 99,876 | 85.5% | D+85.5 | |
| CA-26 | DEM | 180,448 | 70.3% | D+40.7 | |
| CA-27 | Mel LevineDEM | DEM | 220,335 | 67.5% | D+37.9 |
| CA-28 | DEM | 144,337 | 76.1% | D+56.2 | |
| CA-29 | DEM | 106,436 | 82.8% | D+69.2 | |
| CA-30 | DEM | 120,644 | 59.9% | D+23.6 | |
| CA-31 | DEM | 141,027 | 71.6% | D+46.0 | |
| CA-32 | DEM | 171,349 | 66.9% | D+37.3 | |
| CA-33 | David DreierREP | REP | 219,383 | 69.2% | R+42.9 |
| CA-34 | DEM | 145,727 | 63.2% | D+28.2 | |
| CA-35 | Jerry LewisREP | REP | 257,268 | 70.4% | R+42.8 |
| CA-36 | DEM | 191,648 | 54.0% | D+11.5 | |
| CA-37 | REP | 271,242 | 64.3% | R+31.2 | |
| CA-38 | REP | 147,369 | 59.5% | R+23.9 | |
| CA-39 | REP | 229,359 | 73.8% | R+51.1 | |
| CA-40 | REP | 270,376 | 67.0% | R+37.2 | |
| CA-41 | Bill LoweryREP | REP | 285,761 | 65.6% | R+34.7 |
| CA-42 | REP | 238,621 | 64.2% | R+31.2 | |
| CA-43 | Ron PackardREP | REP | 282,529 | 71.7% | R+46.0 |
| CA-44 | Jim BatesDEM | DEM | 152,089 | 59.7% | D+23.2 |
| CA-45 | REP | 224,903 | 74.0% | R+50.0 |