The 25th New Zealand Parliament was a term of the New Zealand Parliament. It opened on 25 March 1936, following the 1935 election. It was dissolved on 16 September 1938 in preparation for the 1938 election. The 25th Parliament was notable in that it was the first time the Labour Party had a parliamentary majority and formed a government, the First Labour Government. The new Prime Minister was Michael Joseph Savage. The opposition consisted of the United Party and the Reform Party, which merged to form the National Party in 1936.