The selection of the Democratic Party's vice presidential candidate for the 1964 United States presidential election occurred at the party's national convention and resulted in the selection of Hubert Humphrey to join the ticket with President Lyndon Johnson, who was running for election to a full term.

Edmund Gerald "Pat" Brown was an American lawyer and politician who served as the 32nd governor of California from 1959 to 1967. His first elected office was as district attorney for San Francisco, and he was later elected Attorney General of California in 1950, before becoming the state's governor after the 1958 California gubernatorial election.