Waitaki is an electorate for the New Zealand House of Representatives that crosses the boundary of North Otago and South Canterbury towns on the East Coast of the South Island. The electorate was first established for the 1871 election that determined the 5th New Zealand Parliament. It has been abolished and re-established several times and in its early years was a two-member electorate for two parliamentary terms. The current electorate has existed since the 2008 election and is held by Jacqui Dean of the National Party.