| Election Name: | 2000 California State Senate election |
| Country: | California |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 1998 California State Senate election |
| Previous Year: | 1998 |
| Next Election: | 2002 California State Senate election |
| Next Year: | 2002 |
| Seats For Election: | 20 seats from odd-numbered districts in the California State Senate |
| Majority Seats: | 21 |
| Leader1: | John Burton |
| Party1: | California Democratic Party |
| Leaders Seat1: | 3rd–San Francisco |
| Seats Before1: | 25 |
| Seats After1: | 26 |
| Seat Change1: | 1 |
| Popular Vote1: | 2,936,160 |
| Percentage1: | 51.29% |
| Leader2: | Jim Brulte |
| Party2: | California Republican Party |
| Leaders Seat2: | 31st–Rancho Cucamonga |
| Seats Before2: | 15 |
| Seats After2: | 14 |
| Seat Change2: | 1 |
| Popular Vote2: | 2,564,155 |
| Percentage2: | 44.80% |
| Map Size: | 450px |
| President pro tempore | |
| Posttitle: | President pro tempore-designate |
| Before Election: | John L. Burton |
| Before Party: | California Democratic Party |
| After Election: | John L. Burton |
| After Party: | California Democratic Party |
The 2000 California State Senate elections were held on November 7, 2000. Senate seats of odd-numbered districts were up for election. Senate terms are staggered so that half the membership is elected every two years. Senators serve four-year terms and are limited to two terms. The Democratic Party held on to the majority of the seats, gaining one seat in the process.
| California State Senate elections, 2000 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Party | Votes | Percentage | Not up | Incumbents | Open | Before | After | +/– | ||
| Democratic | 2,936,160 | 51.29% | 15 | 6 | 4 | 25 | 26 | +1 | ||
| Republican | 2,564,155 | 44.80% | 5 | 5 | 5 | 15 | 14 | -1 | ||
| Libertarian | 162,285 | 2.84% | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Natural Law | 61,528 | 1.07% | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Invalid or blank votes | 395,547 | 6.46% | — | — | — | — | — | — | ||
| Totals | 6,119,765 | 100.00% | 20 | 11 | 9 | 40 | 40 | — | ||
Final results from the California Secretary of State:[1]
| align=center | District 1 • District 3 • District 5 • District 7 • District 9 • District 11 • District 13 • District 15 • District 17 • District 19 • District 21 • District 23 • District 25 • District 27 • District 29 • District 31 • District 33 • District 35 • District 37 • District 39 |