The New Zealand Constitution Act 1852 (15 & 16 Vict. c. 72) was an act of the Parliament of the United Kingdom that granted self-government to the Colony of New Zealand. It was the second such act, the New Zealand Constitution Act 1846 not having been fully implemented. The purpose of the act was to have constitutional independence from Britain. The definition of franchise or the ability to vote excluded all women, most Māori, all non-British people and those with convictions for serious offences.
The act took effect upon proclamation by Governor George Grey on 17 January 1853. It remained in force as part of New Zealand's constitution until it was rendered ineffective by the Constitution Act 1986.