The 2020 California State Senate election was held on Tuesday, November 3, 2020, with the primary election scheduled for March 3, 2020. Voters in the 20 odd-numbered districts of the California State Senate elected their representatives. The elections coincided with the elections for other offices, including for U.S. President and the state assembly.

The California State Senate is the upper house of the California State Legislature, the lower house being the California State Assembly. The state senate convenes, along with the state assembly, at the California State Capitol in Sacramento.