Mangere by election, 1977

The Mangere by-election of 1977 was a by-election for the electorate of Mangere on 26 March 1977 during the 38th New Zealand Parliament. The by-election resulted from the resignation of the previous member Colin Moyle after accusations against him in parliament, and he was replaced by David Lange, also of the Labour Party. Apart from Lange, there were seven other candidates in the by-election.

The by-election put Lange (who had stood unsuccessfully in 1975 for Hobson) into parliament, and the attention that he got helped propel him to the leadership of the parliamentary Labour Party in February 1983, and then a landslide victory over Muldoon in the 1984 general election.