| Election Name: | 2018 California State Assembly election |
| Country: | California |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2016 California State Assembly election |
| Previous Year: | 2016 |
| Next Election: | 2020 California State Assembly election |
| Next Year: | 2020 |
| Seats For Election: | All 80 seats in the California State Assembly |
| Majority Seats: | 41 |
| Image1: | File:Anthony Rendon official photo (cropped).jpg |
| Leader1: | Anthony Rendon |
| Party1: | California Democratic Party |
| Leader Since1: | March 7, 2016 |
| Leaders Seat1: | 63rd–Lakewood |
| Last Election1: | 55 seats, 61.08% |
| Seats1: | 60 |
| Seat Change1: | 5 |
| Popular Vote1: | 7,872,315 |
| Percentage1: | 66.76% |
| Swing1: | 5.68pp |
| Leader2: | Brian Dahle |
| Party2: | California Republican Party |
| Leader Since2: | September 16, 2017 |
| Leaders Seat2: | 1st–Bieber |
| Last Election2: | 25 seats, 37.36% |
| Seats2: | 20 |
| Seat Change2: | 5 |
| Popular Vote2: | 3,710,882 |
| Percentage2: | 31.47% |
| Swing2: | 5.89pp |
| Speaker | |
| Before Election: | Anthony Rendon |
| Before Party: | California Democratic Party |
| After Election: | Anthony Rendon |
| After Party: | California Democratic Party |
The 2018 California State Assembly election was held on Tuesday, November 6, 2018, with the primary election being held on June 5, 2018. Voters in the 80 districts of the California State Assembly elected their representatives. The election coincided with those for other offices, including for governor and the California State Senate.
The Democratic Party flipped five Republican seats: the 16th, 38th, 40th, 74th, and 76th districts. These victories gave the Democrats a three-fourths supermajority of 60 seats, building upon the two-thirds supermajority that they gained in the previous election cycle.
| California State Assembly election, 2018 Primary election — June 5, 2018 | |||||||
|---|---|---|---|---|---|---|---|
| Party | Votes | Percentage | Candidates | Advancing to general | Seats contesting | ||
| Democratic | 3,977,057 | 63.65% | 140 | 91 | 80 | ||
| Republican | 2,221,851 | 35.56% | 85 | 59 | 59 | ||
| Libertarian | 24,664 | 0.39% | 10 | 5 | 5 | ||
| Green | 14,462 | 0.23% | 4 | 0 | 0 | ||
| No party preference | 10,105 | 0.16% | 4 | 1 | 1 | ||
| Totals | 6,248,139 | 100.00% | 243 | 156 | — | ||
| California State Assembly election, 2018 General election — November 6, 2018 | ||||||
|---|---|---|---|---|---|---|
| Party | Votes | Percentage | Seats | +/– | ||
| Democratic | 7,872,315 | 66.76% | 60 | 5 | ||
| Republican | 3,710,882 | 31.47% | 20 | 5 | ||
| Libertarian | 145,514 | 1.23% | 0 | 0 | ||
| No party preference | 63,272 | 0.54% | 0 | 0 | ||
| Valid votes | 11,791,983 | — | — | |||
| Invalid votes | — | — | ||||
| Totals | 100.00% | 80 | — | |||
| Voter turnout | 64.5% | |||||
Source: Official results.[1] [2]