The 2000 U.S. Senate election in California was held on November 7, 2000. Incumbent Democratic U.S. Senator Dianne Feinstein won re-election to her second full term.

Dianne Emiel Feinstein was an American politician who served as a United States senator from California from 1992 until her death in 2023. A member of the Democratic Party, she served as mayor of San Francisco from 1978 to 1988.