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 previous 1846 Act not having been fully implemented. The Act remained in force as part of New Zealand's constitution until it was repealed by the Constitution Act 1986. The long title of the Act was "An Act to Grant a Representative Constitution to the Colony of New Zealand". The Act received the Royal Assent on 30 June 1852.