| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | DEM | 217,016 | 74.0% | D+47.9 | |
| CA-02 | REP | 216,563 | 56.0% | R+15.0 | |
| CA-03 | John E MossDEM | DEM | 191,854 | 72.9% | D+45.7 |
| CA-04 | DEM | 151,037 | 50.2% | D+0.4 | |
| CA-05 | DEM | 167,754 | 61.8% | D+23.7 | |
| CA-06 | DEM | 130,916 | 66.1% | D+39.1 | |
| CA-07 | DEM | 196,816 | 74.7% | D+51.4 | |
| CA-08 | DEM | 196,954 | 62.1% | D+27.4 | |
| CA-09 | DEM | 164,391 | 70.8% | D+43.7 | |
| CA-10 | Don EdwardsDEM | DEM | 155,443 | 72.0% | D+47.5 |
| CA-11 | Leo J RyanDEM | DEM | 176,194 | 61.1% | D+25.6 |
| CA-12 | REP | 196,857 | 66.2% | R+35.0 | |
| CA-13 | DEM | 202,611 | 66.8% | D+35.6 | |
| CA-14 | DEM | 169,959 | 72.5% | D+45.1 | |
| CA-15 | B F SiskDEM | DEM | 128,435 | 72.2% | D+44.4 |
| CA-16 | DEM | 195,705 | 53.4% | D+6.8 | |
| CA-17 | John KrebsDEM | DEM | 158,168 | 65.7% | D+31.4 |
| CA-18 | REP | 158,341 | 64.2% | R+28.4 | |
| CA-19 | REP | 192,923 | 64.4% | R+28.8 | |
| CA-20 | REP | 217,351 | 67.3% | R+34.5 | |
| CA-21 | DEM | 153,109 | 66.5% | D+37.7 | |
| CA-22 | REP | 183,312 | 62.6% | R+25.2 | |
| CA-23 | DEM | 217,053 | 60.2% | D+20.4 | |
| CA-24 | DEM | 159,774 | 67.8% | D+35.6 | |
| CA-25 | DEM | 80,625 | 71.9% | D+49.9 | |
| CA-26 | REP | 171,712 | 65.6% | R+31.2 | |
| CA-27 | REP | 209,611 | 54.7% | R+9.4 | |
| CA-28 | DEM | 142,915 | 80.2% | D+60.4 | |
| CA-29 | DEM | 96,602 | 85.4% | D+74.2 | |
| CA-30 | DEM | 111,270 | 74.4% | D+48.8 | |
| CA-31 | DEM | 83,155 | 100.0% | D+100.0 | |
| CA-32 | DEM | 127,428 | 72.2% | D+44.5 | |
| CA-33 | Del ClawsonREP | REP | 173,205 | 55.1% | R+10.2 |
| CA-34 | DEM | 199,135 | 50.7% | D+1.4 | |
| CA-35 | Jim LloydDEM | DEM | 164,237 | 53.3% | D+6.5 |
| CA-36 | DEM | 147,556 | 61.6% | D+28.1 | |
| CA-37 | REP | 188,007 | 71.1% | R+45.0 | |
| CA-38 | DEM | 162,409 | 63.6% | D+27.2 | |
| CA-39 | REP | 209,402 | 58.6% | R+17.1 | |
| CA-40 | REP | 250,644 | 59.3% | R+18.5 | |
| CA-41 | Bob C WilsonREP | REP | 223,374 | 57.6% | R+15.3 |
| CA-42 | DEM | 135,627 | 76.0% | D+52.0 | |
| CA-43 | REP | 267,051 | 65.0% | R+30.0 |