The Fifth Hughes ministry (Nationalist) was the 15th ministry of the Government of Australia. It was led by the country's 7th Prime Minister, Billy Hughes. The Fifth Hughes ministry succeeded the Fourth Hughes ministry, which dissolved on 3 February 1920 following the federal election that took place in December. The ministry was replaced by the First Bruce ministry on 9 February 1923 following the 1922 federal election and the subsequent resignation of Hughes as Prime Minister.

Richard Witty Foster was an Australian politician. He began his career in the Parliament of South Australia (1893–1906) and served two terms as Commissioner of Public Works in liberal and conservative governments. He was elected to federal parliament in 1909 as a Liberal, later joining the Nationalists. He was Minister for Works and Railways (1921–1923) under Prime Minister Billy Hughes, eventually losing his seat at the 1928 election.