Sir Joseph George Ward, 1st Baronet, GCMG, PC (26 April 1856 – 8 July 1930) was a New Zealand politician who served as the 17th prime minister of New Zealand from 1906 to 1912 and from 1928 to 1930. He was a dominant figure in the Liberal and United ministries of the late 19th and early 20th centuries. During the First World War, Ward led his party in a coalition with the Reform Party. As co-leader of the government, Ward had a strained working relationship with Prime Minister William Massey. The coalition was dissolved in 1919 and Ward resigned as Liberal leader.