| Election Name: | 2006 California State Senate election |
| Country: | California |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2004 California State Senate election |
| Previous Year: | 2004 |
| Next Election: | 2008 California State Senate election |
| Next Year: | 2008 |
| Seats For Election: | 20 seats from even-numbered districts in the California State Senate |
| Majority Seats: | 21 |
| Leader1: | Don Perata |
| Party1: | California Democratic Party |
| Leaders Seat1: | 9th–Oakland |
| Last Election1: | 25 |
| Seats1: | 25 |
| Popular Vote1: | 1,903,307 |
| Percentage1: | 54.19% |
| Leader2: | Dick Ackerman |
| Party2: | California Republican Party |
| Leaders Seat2: | 33rd–Irvine |
| Last Election2: | 15 |
| Seats2: | 15 |
| Popular Vote2: | 1,450,607 |
| Percentage2: | 41.30% |
| Map Size: | 450px |
| President pro tempore | |
| Posttitle: | President pro tempore designate |
| Before Election: | Don Perata |
| Before Party: | California Democratic Party |
| After Election: | Don Perata |
| After Party: | California Democratic Party |
The 2006 California State Senate elections were held on November 7, 2006. Voters in the 20 even-numbered districts of the California State Senate voted for their representatives. The California Democratic Party retained its majority and its 25 seats. The California Republican Party retained control of the remaining 15 seats. Neither party lost nor gained any seats.
| California State Senate elections, 2006[1] [2] | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Party | Votes | Percentage | Not up | Incumbents | Open | Before | After | ||
| Democratic | 1,903,307 | 54.19% | 11 | 4 | 10 | 25 | 25 | ||
| Republican | 1,450,607 | 41.30% | 9 | 4 | 2 | 15 | 15 | ||
| Libertarian | 138,669 | 3.95% | 0 | 0 | 0 | 0 | 0 | ||
| Green | 13,443 | 0.38% | 0 | 0 | 0 | 0 | 0 | ||
| Peace and Freedom | 5,573 | 0.16% | 0 | 0 | 0 | 0 | 0 | ||
| Independent | 911 | 0.03% | 0 | 0 | 0 | 0 | 0 | ||
| Totals | 3,512,510 | 100.00% | 20 | 8 | 12 | 40 | 40 | ||
Final results from the California Secretary of State:[3]
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