| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | REP | 230,261 | 43.3% | R+1.4 | |
| CA-02 | Wally HergerREP | REP | 209,401 | 63.7% | R+32.5 |
| CA-03 | DEM | 219,088 | 60.3% | D+25.6 | |
| CA-04 | Vic FazioDEM | DEM | 210,454 | 54.7% | D+15.4 |
| CA-05 | Nancy PelosiDEM | DEM | 156,304 | 77.2% | D+54.4 |
| CA-06 | DEM | 201,708 | 68.1% | D+36.1 | |
| CA-07 | DEM | 200,111 | 60.5% | D+21.0 | |
| CA-08 | DEM | 195,189 | 61.3% | D+22.6 | |
| CA-09 | DEM | 162,151 | 58.4% | D+16.9 | |
| CA-10 | Don EdwardsDEM | DEM | 130,637 | 62.7% | D+25.4 |
| CA-11 | Tom LantosDEM | DEM | 159,365 | 65.9% | D+37.1 |
| CA-12 | REP | 205,698 | 60.9% | R+27.2 | |
| CA-13 | DEM | 167,646 | 58.0% | D+22.4 | |
| CA-14 | REP | 249,051 | 51.5% | R+3.0 | |
| CA-15 | DEM | 146,781 | 66.2% | D+32.4 | |
| CA-16 | DEM | 181,002 | 74.2% | D+52.1 | |
| CA-17 | DEM | 151,459 | 54.5% | D+9.1 | |
| CA-18 | DEM | 98,804 | 100.0% | D+100.0 | |
| CA-19 | REP | 173,245 | 54.6% | R+10.2 | |
| CA-20 | REP | 188,925 | 59.8% | R+25.3 | |
| CA-21 | REP | 202,611 | 58.4% | R+24.4 | |
| CA-22 | REP | 180,929 | 60.0% | R+26.0 | |
| CA-23 | DEM | 167,093 | 61.7% | D+27.5 | |
| CA-24 | DEM | 103,875 | 68.9% | D+43.3 | |
| CA-25 | DEM | 68,717 | 70.0% | D+45.3 | |
| CA-26 | DEM | 127,791 | 61.1% | D+26.3 | |
| CA-27 | Mel LevineDEM | DEM | 156,098 | 58.2% | D+21.0 |
| CA-28 | DEM | 95,600 | 72.7% | D+50.5 | |
| CA-29 | DEM | 64,672 | 79.4% | D+60.8 | |
| CA-30 | DEM | 78,083 | 58.2% | D+21.2 | |
| CA-31 | DEM | 83,987 | 67.2% | D+34.3 | |
| CA-32 | DEM | 110,960 | 61.5% | D+23.1 | |
| CA-33 | David DreierREP | REP | 159,157 | 63.7% | R+32.3 |
| CA-34 | DEM | 91,670 | 60.7% | D+21.4 | |
| CA-35 | Jerry LewisREP | REP | 200,722 | 60.6% | R+27.6 |
| CA-36 | DEM | 137,370 | 52.7% | D+5.4 | |
| CA-37 | REP | 232,082 | 49.8% | R+5.0 | |
| CA-38 | REP | 104,254 | 58.1% | R+16.2 | |
| CA-39 | REP | 174,228 | 65.3% | R+34.5 | |
| CA-40 | REP | 210,386 | 67.6% | R+35.3 | |
| CA-41 | Bill LoweryREP | REP | 214,737 | 49.2% | R+5.7 |
| CA-42 | REP | 184,286 | 59.3% | R+22.9 | |
| CA-43 | Ron PackardREP | REP | 222,138 | 68.1% | R+68.1 |
| CA-44 | REP | 108,711 | 46.3% | R+1.5 | |
| CA-45 | REP | 169,659 | 72.8% | R+72.8 |