| District ▲ | Winner | Party | Votes | % | Margin |
|---|---|---|---|---|---|
| CA-01 | DEM | 234,592 | 62.8% | D+31.8 | |
| CA-02 | Wally HergerREP | REP | 228,940 | 57.1% | R+14.3 |
| CA-03 | REP | 261,938 | 50.1% | R+6.9 | |
| CA-04 | REP | 304,229 | 61.3% | R+29.8 | |
| CA-05 | DEM | 172,410 | 72.0% | D+46.8 | |
| CA-06 | DEM | 261,152 | 65.9% | D+36.3 | |
| CA-07 | DEM | 179,199 | 68.3% | D+36.6 | |
| CA-08 | Nancy PelosiDEM | DEM | 209,696 | 80.1% | D+65.0 |
| CA-09 | Barbara LeeDEM | DEM | 214,085 | 84.3% | D+73.5 |
| CA-10 | DEM | 233,806 | 58.8% | D+21.0 | |
| CA-11 | DEM | 240,503 | 48.0% | D+1.1 | |
| CA-12 | DEM | 201,162 | 75.6% | D+53.5 | |
| CA-13 | DEM | 164,378 | 72.0% | D+44.2 | |
| CA-14 | Anna G EshooDEM | DEM | 218,869 | 69.1% | D+41.3 |
| CA-15 | DEM | 186,615 | 67.6% | D+35.2 | |
| CA-16 | Zoe LofgrenDEM | DEM | 156,058 | 67.8% | D+43.5 |
| CA-17 | Sam FarrDEM | DEM | 178,139 | 66.7% | D+36.8 |
| CA-18 | DEM | 124,569 | 58.5% | D+17.0 | |
| CA-19 | Jeff DenhamREP | REP | 198,902 | 64.5% | R+29.4 |
| CA-20 | Jim CostaDEM | DEM | 89,444 | 51.7% | D+3.4 |
| CA-21 | REP | 135,979 | 100.0% | R+100.0 | |
| CA-22 | REP | 175,663 | 98.8% | R+98.8 | |
| CA-23 | Lois CappsDEM | DEM | 193,463 | 57.8% | D+20.2 |
| CA-24 | REP | 240,334 | 59.9% | R+19.9 | |
| CA-25 | REP | 191,336 | 61.8% | R+23.7 | |
| CA-26 | David DreierREP | REP | 208,347 | 54.1% | R+17.6 |
| CA-27 | Brad ShermanDEM | DEM | 157,983 | 65.2% | D+30.3 |
| CA-28 | DEM | 127,107 | 69.5% | D+47.1 | |
| CA-29 | DEM | 161,126 | 64.8% | D+32.8 | |
| CA-30 | DEM | 237,747 | 64.6% | D+32.7 | |
| CA-31 | DEM | 91,106 | 83.8% | D+67.6 | |
| CA-32 | Judy ChuDEM | DEM | 109,456 | 71.0% | D+42.1 |
| CA-33 | Karen BassDEM | DEM | 153,333 | 86.1% | D+72.2 |
| CA-34 | DEM | 89,839 | 77.2% | D+54.5 | |
| CA-35 | DEM | 123,694 | 79.3% | D+58.7 | |
| CA-36 | Jane HarmanDEM | DEM | 192,035 | 59.6% | D+24.9 |
| CA-37 | DEM | 125,518 | 68.4% | D+45.1 | |
| CA-38 | DEM | 116,342 | 73.5% | D+46.9 | |
| CA-39 | DEM | 128,961 | 63.3% | D+30.7 | |
| CA-40 | REP | 178,855 | 66.8% | R+33.6 | |
| CA-41 | Jerry LewisREP | REP | 202,286 | 63.2% | R+26.4 |
| CA-42 | REP | 204,398 | 62.2% | R+30.4 | |
| CA-43 | Joe BacaDEM | DEM | 106,916 | 65.5% | D+31.0 |
| CA-44 | Ken CalvertREP | REP | 193,266 | 55.6% | R+11.2 |
| CA-45 | REP | 206,801 | 51.5% | R+9.3 | |
| CA-46 | REP | 224,782 | 62.2% | R+24.4 | |
| CA-47 | DEM | 95,954 | 53.0% | D+13.7 | |
| CA-48 | REP | 242,719 | 59.9% | R+23.5 | |
| CA-49 | REP | 189,677 | 62.8% | R+31.3 | |
| CA-50 | REP | 251,081 | 56.6% | R+17.7 | |
| CA-51 | Bob FilnerDEM | DEM | 143,916 | 60.0% | D+20.1 |
| CA-52 | REP | 221,062 | 63.1% | R+31.0 | |
| CA-53 | DEM | 168,328 | 62.3% | D+28.3 |