The National Party was a political party active in South Australia from 1917 to 1923. As with the federal National Labor Party, it was created in the wake of the Australian Labor Party split over conscription, resulting in the February 1917 expulsion from the South Australian Labor Party of the Premier, Crawford Vaughan, and his supporters. It was initially known as the National Labor Party like its federal counterpart, but was renamed at a conference in June 1917. The party initially continued in government under Vaughan, but was subsequently defeated in parliament in July 1917, and thereafter served as the junior partner in a coalition with the Liberal Union under Archibald Peake.