| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | DEM | 210,812 | 59.4% | D+18.7 | |
| CA-02 | REP | 220,260 | 52.0% | R+6.7 | |
| CA-03 | DEM | 197,503 | 53.4% | D+6.9 | |
| CA-04 | Vic FazioDEM | DEM | 158,497 | 55.4% | D+10.8 |
| CA-05 | DEM | 158,649 | 66.8% | D+33.7 | |
| CA-06 | DEM | 119,768 | 68.3% | D+40.3 | |
| CA-07 | DEM | 172,865 | 63.5% | D+29.7 | |
| CA-08 | DEM | 165,305 | 57.4% | D+14.7 | |
| CA-09 | DEM | 134,879 | 65.4% | D+34.9 | |
| CA-10 | Don EdwardsDEM | DEM | 125,862 | 67.1% | D+34.3 |
| CA-11 | Leo J RyanDEM | DEM | 153,464 | 60.5% | D+24.9 |
| CA-12 | REP | 160,085 | 73.1% | R+51.5 | |
| CA-13 | DEM | 175,361 | 57.5% | D+18.0 | |
| CA-14 | REP | 179,727 | 53.4% | R+10.8 | |
| CA-15 | Tony CoelhoDEM | DEM | 125,126 | 60.1% | D+20.2 |
| CA-16 | DEM | 170,358 | 61.4% | D+22.7 | |
| CA-17 | REP | 149,181 | 54.5% | R+9.0 | |
| CA-18 | REP | 144,563 | 59.3% | R+18.5 | |
| CA-19 | REP | 171,751 | 71.7% | R+47.5 | |
| CA-20 | REP | 195,409 | 66.4% | R+32.8 | |
| CA-21 | DEM | 124,138 | 59.5% | D+23.6 | |
| CA-22 | REP | 153,944 | 64.6% | R+29.3 | |
| CA-23 | DEM | 178,994 | 65.6% | D+31.3 | |
| CA-24 | DEM | 135,771 | 62.7% | D+30.1 | |
| CA-25 | DEM | 68,086 | 67.4% | D+34.8 | |
| CA-26 | REP | 113,059 | 100.0% | R+100.0 | |
| CA-27 | REP | 175,272 | 51.0% | R+2.0 | |
| CA-28 | DEM | 97,592 | 100.0% | D+100.0 | |
| CA-29 | DEM | 76,726 | 85.0% | D+70.0 | |
| CA-30 | DEM | 92,752 | 71.4% | D+42.8 | |
| CA-31 | DEM | 82,157 | 67.8% | D+35.5 | |
| CA-32 | DEM | 103,609 | 71.4% | D+49.0 | |
| CA-33 | REP | 142,073 | 56.0% | R+12.0 | |
| CA-34 | REP | 168,572 | 53.7% | R+10.1 | |
| CA-35 | Jim LloydDEM | DEM | 148,830 | 54.0% | D+8.0 |
| CA-36 | DEM | 127,865 | 62.9% | D+25.8 | |
| CA-37 | Jerry LewisREP | REP | 173,588 | 61.4% | R+26.6 |
| CA-38 | DEM | 128,769 | 58.6% | D+17.2 | |
| CA-39 | REP | 176,051 | 63.7% | R+27.4 | |
| CA-40 | REP | 224,240 | 66.0% | R+31.9 | |
| CA-41 | Bob C WilsonREP | REP | 185,225 | 58.1% | R+16.3 |
| CA-42 | DEM | 115,445 | 73.7% | D+47.5 | |
| CA-43 | REP | 243,458 | 68.7% | R+37.3 |