Bruce by-election may refer to several by-elections in the history of the electorate in New Zealand:
1862 Bruce by-election April 1865 Bruce by-election July 1865 Bruce by-election 1870 Bruce by-election 1883 Bruce by-election 1885 Bruce by-election 1892 Bruce by-election 1920 Bruce by-election
There has also been one by-election in the Division of Bruce in Victoria, Australia: 1983 Bruce by-election