Bầu cử tổng thống Hoa Kỳ tại California năm 1900

The 1900 United States presidential election in California took place on November 6, 1900, as part of the 1900 United States presidential election. State voters chose nine representatives, or electors, to the Electoral College, who voted for president and vice president.

California voted for the Republican nominee, President William McKinley, over the Democratic nominee, former U.S. Representative and 1896 Democratic presidential nominee William Jennings Bryan. McKinley won the state by a margin of 13.16% in this rematch of the 1896 presidential election. After a series of close elections in the state, this was the first time since 1872 that a candidate won California by double digits. The return of economic prosperity and recent victory in the Spanish–American War helped McKinley to score a decisive victory. McKinley flipped 15 counties, including Mendocino County, which to that point had never voted for a Republican candidate. This election was also the first time since 1872 that a Republican carried Amador County, Siskiyou County, and Tehama County.

Bryan had previously lost California to McKinley four years earlier and would later lose the state again in 1908 to William Howard Taft.