The Bavin ministry was the 44th ministry of the New South Wales Government, and was led by the 24th Premier, Thomas Bavin, in a Nationalist coalition with the Country Party, led by Ernest Buttenshaw. Bavin was first elected to the New South Wales Legislative Assembly in 1917 and served continuously until 1935. Having served as a senior minister in the first and second Fuller ministries, in 1925 Bavin was elected leader of the Nationalist Party in New South Wales and became Leader of the Opposition. Buttenshaw was also first elected to the Assembly in 1917 and served continuously until 1938. Initially a member of the Nationalist Party, in 1922 he helped establish the Progressive Party and became a member of its successor, the Country Party, and elected as party leader in 1925.