The Fifth Labour Government of New Zealand was the government of New Zealand from 10 December 1999 to 19 November 2008. Labour Party leader Helen Clark negotiated a coalition with Jim Anderton, leader of the Alliance Party. While undertaking a number of substantial reforms, it was not particularly radical compared to previous Labour governments.

Helen Elizabeth Clark is a New Zealand politician who served as the 37th prime minister of New Zealand from 1999 to 2008, and was the administrator of the United Nations Development Programme from 2009 to 2017. She was New Zealand's fifth-longest-serving prime minister, and the second woman to hold that office.