| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | DEM | 252,223 | 62.3% | D+24.5 | |
| CA-02 | REP | 228,472 | 69.5% | R+38.9 | |
| CA-03 | DEM | 131,369 | 100.0% | D+100.0 | |
| CA-04 | Vic FazioDEM | DEM | 211,921 | 61.4% | D+24.7 |
| CA-05 | Sala BurtonDEM | DEM | 193,204 | 72.3% | D+48.5 |
| CA-06 | DEM | 239,096 | 68.0% | D+38.3 | |
| CA-07 | DEM | 237,291 | 66.7% | D+33.4 | |
| CA-08 | DEM | 239,223 | 60.3% | D+20.6 | |
| CA-09 | DEM | 195,308 | 69.9% | D+43.6 | |
| CA-10 | Don EdwardsDEM | DEM | 164,177 | 62.4% | D+28.1 |
| CA-11 | Tom LantosDEM | DEM | 211,115 | 69.9% | D+41.7 |
| CA-12 | Ed ZschauREP | REP | 252,693 | 61.6% | R+25.6 |
| CA-13 | DEM | 214,353 | 65.2% | D+32.3 | |
| CA-14 | REP | 244,472 | 73.3% | R+49.4 | |
| CA-15 | Tony CoelhoDEM | DEM | 167,406 | 65.5% | D+32.8 |
| CA-16 | DEM | 216,687 | 70.8% | D+43.1 | |
| CA-17 | REP | 177,690 | 72.5% | R+45.0 | |
| CA-18 | DEM | 190,525 | 67.3% | D+34.6 | |
| CA-19 | REP | 227,626 | 67.3% | R+36.4 | |
| CA-20 | REP | 214,039 | 70.9% | R+41.8 | |
| CA-21 | REP | 239,968 | 72.3% | R+46.4 | |
| CA-22 | REP | 217,017 | 85.2% | R+85.2 | |
| CA-23 | DEM | 228,134 | 61.6% | D+24.7 | |
| CA-24 | DEM | 153,607 | 63.4% | D+30.2 | |
| CA-25 | DEM | 103,599 | 71.7% | D+47.6 | |
| CA-26 | DEM | 186,452 | 62.8% | D+25.6 | |
| CA-27 | Mel LevineDEM | DEM | 212,781 | 55.0% | D+13.2 |
| CA-28 | DEM | 149,517 | 75.6% | D+53.2 | |
| CA-29 | DEM | 125,558 | 86.6% | D+73.3 | |
| CA-30 | DEM | 124,333 | 51.8% | D+8.4 | |
| CA-31 | DEM | 142,349 | 70.7% | D+41.4 | |
| CA-32 | DEM | 169,705 | 60.7% | D+24.0 | |
| CA-33 | David DreierREP | REP | 208,619 | 70.6% | R+44.7 |
| CA-34 | DEM | 145,527 | 59.8% | D+19.6 | |
| CA-35 | Jerry LewisREP | REP | 206,467 | 85.5% | R+85.5 |
| CA-36 | DEM | 184,650 | 56.6% | D+13.1 | |
| CA-37 | REP | 235,863 | 63.6% | R+27.1 | |
| CA-38 | REP | 162,797 | 53.2% | R+8.2 | |
| CA-39 | REP | 230,677 | 76.2% | R+52.4 | |
| CA-40 | REP | 254,974 | 64.4% | R+30.4 | |
| CA-41 | Bill LoweryREP | REP | 253,846 | 63.5% | R+29.8 |
| CA-42 | REP | 243,619 | 73.0% | R+48.3 | |
| CA-43 | Ron PackardREP | REP | 223,517 | 74.1% | R+51.3 |
| CA-44 | Jim BatesDEM | DEM | 142,561 | 69.7% | D+41.7 |
| CA-45 | REP | 198,307 | 75.1% | R+52.3 |