East Coast Bays by-election, 1980

The East Coast Bays by-election of 1980 was a by-election during the 39th New Zealand Parliament in the East Coast Bays electorate. It was prompted by the resignation of Frank Gill, a National Party MP, to take up a position as New Zealand's ambassador to the United States. It resulted in the election of Gary Knapp, the candidate of the Social Credit Party. This result was unexpected, as minor parties rarely won seats in Parliament at the time (although such voting is more likely in a by-election). Knapp held the seat until the 1987 general election, when he was defeated by National's Murray McCully.