Te Tai Tonga is a New Zealand parliamentary Māori electorate, returning one Member of Parliament to the New Zealand House of Representatives. The current MP for Te Tai Tonga is Rino Tirikatene of the Labour Party, who in 2011 defeated Rahui Katene of the Māori Party, who in turn had won the seat in 2008.
Te Tai Tonga is by far the largest of the seventy-one electorates of New Zealand, covering all of the South Island, Stewart Island, the Chatham Islands, all the islands in the Southern Ocean and a large part of the Wellington urban area, namely Wellington City as far as Johnsonville, and Petone, Lower Hutt and Eastbourne from the Hutt Valley. Besides Wellington, the main centres in te Tai Tonga are Dunedin, Christchurch, Nelson, Timaru, Invercargill, Queenstown and Oamaru.
Te Tai Tonga's size was marginally decreased after a review of boundaries in 2007, when the suburbs of Naenae and Taitā were moved into Ikaroa-Rāwhiti. The 2013/14 redistribution did not further alter the boundaries of the electorate.