| Election Name: | 2002 California State Assembly election |
| Country: | California |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2000 California State Assembly election |
| Previous Year: | 2000 |
| Next Election: | 2004 California State Assembly election |
| Next Year: | 2004 |
| Seats For Election: | All 80 seats in the California State Assembly |
| Majority Seats: | 41 |
| Image1: | Herb Wesson, 2001.jpg |
| Leader1: | Herb Wesson |
| Party1: | California Democratic Party |
| Leaders Seat1: | 47th–Los Angeles |
| Last Election1: | 50 seats, 57.05% |
| Seats1: | 48 |
| Seat Change1: | 2 |
| Popular Vote1: | 3,686,124 |
| Percentage1: | 53.41% |
| Leader2: | Dave Cox |
| Party2: | California Republican Party |
| Leaders Seat2: | 5th–Fair Oaks |
| Last Election2: | 30 seats, 38.69% |
| Seats2: | 32 |
| Seat Change2: | 2 |
| Popular Vote2: | 3,018,783 |
| Percentage2: | 43.74% |
| Speaker | |
| Posttitle: | Elected Speaker |
| Before Election: | Herb Wesson |
| Before Party: | California Democratic Party |
| After Election: | Herb Wesson |
| After Party: | California Democratic Party |
The 2002 California State Assembly elections were held on November 5, 2002. California's State Assembly in its entirety comes up for election in even numbered years. Each seat has a two-year term and members are limited to three 2-year terms (six years). All 80 biennially elected seats in the Assembly were up for election this year. Democrats retained control of the Assembly, though they lost two seats.
| California State Assembly elections, 2002 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Party | Votes | Percentage | Incumbents | Open | Before | After | +/– | ||
| Democratic | 3,686,124 | 53.41% | 32 | 18 | 50 | 48 | -2 | ||
| Republican | 3,018,783 | 43.74% | 16 | 14 | 30 | 32 | +2 | ||
| Libertarian | 162,472 | 2.35% | 0 | 0 | 0 | 0 | 0 | ||
| Green | 30,160 | 0.44% | 0 | 0 | 0 | 0 | 0 | ||
| Reform | 3,806 | 0.06% | 0 | 0 | 0 | 0 | 0 | ||
| Invalid or blank votes | 486,319 | 6.58% | — | — | — | — | — | ||
| Totals | 7,387,664 | 100.00% | 48 | 32 | 80 | 80 | — | ||
| 48 | 32 | |
| Democratic | Republican | |
Final results from the California Secretary of State:[1]
| align=center |