The United States House of Representatives elections in California, 1980 was an election for California's delegation to the United States House of Representatives, which occurred as part of the general election of the House of Representatives on November 4, 1980. Republicans lost one seat (which they had won in a special election) but gained four Democratic-held seats.
Final results from the Clerk of the House of Representatives: http://clerk.house.gov/member_info/electionInfo/1980election.pdf
Leo Ryan, a Democrat, had been elected in the 1978 election, but was assassinated on November 18, 1978. William Royer was elected to finish Ryan's term.