The Rua'au by-election was a by-election in the Cook Islands seat of Rua'au.
It took place on 14 August 2003, and was precipitated by the death of Democratic Party MP Maria Heather.
[1] Three candidates contested the by-election: the Democratic Party's Geoffrey Heather, husband of the former MP; the Cook Islands Party's Vaine Wichman, and Cook Islands National Party leader Teariki Heather.
[1] The poll was won by Geoffrey Heather.
[2] This Oceanian election-related article is a stub.