The New Zealand voting system referendum, 2011, was a referendum on whether to keep the existing mixed member proportional (MMP) voting system, or to change to another voting system, for electing Members of Parliament to New Zealand's House of Representatives. It was held on Saturday 26 November 2011, in conjunction with the 2011 general election, The official results were returned on 10 December 2011, with voters voting by majority to keep the MMP voting system. First Past The Post received the plurality of the alternative system vote.