The Fourth Lyons Ministry was the twenty-fourth Australian Commonwealth ministry, and ran from 29 November 1937 to 7 April 1939.
United Australia Party–Australian Country Party Coalition
Rt Hon Joseph Lyons, MP: Prime Minister (UAP)
Rt Hon Sir Earle Page, GCMG MP: Minister for Commerce. Minister for Health (to 7 November 1938) (CP)
Hon Robert Menzies, KC MP: Attorney-General, Minister for Industry (to 20 March 1939) (UAP)
Senator Hon Alexander McLachlan: Postmaster-General (to 7 November 1938) (UAP)
Hon Thomas White, MP: Minister for Trade and Customs (to 8 November 1938) (UAP)
Hon Richard Casey, MP: Treasurer. Minister in charge of Development and Scientific and Industrial Research (to 7 November 1938) (UAP)
Rt Hon Billy Hughes, KC MP: Minister for External Affairs. Vice-President of the Executive Council, Minister in charge of Territories (to 7 November 1938). Attorney-General, Minister for Industry (from 20 March 1939) (UAP)
Hon Harold Thorby, MP: Minister for Defence (to 7 November 1938), Minister for Works, Minister for Civil Aviation (from 24 November 1938) (CP)
Senator Hon Harry Foll: Minister in charge of war service homes (to 7 November 1938), Minister for Repatriation. Minister for Health (from 7 November 1938) (UAP)
Hon Archie Cameron, MP: Minister without Portfolio (to 7 November 1938), Postmaster-General (from 7 November 1938) (CP)
Hon John McEwen, MP: Minister for the Interior (CP)
Hon Victor Thompson, MP: Minister without portfolio (CP)
Senator Hon Allan MacDonald: Minister without portfolio (UAP)
Hon John Perkins, MP: Minister without portfolio (to 7 November 1938), Minister in charge of Territories (7 November 1938 to 8 November 1938), Minister for Trade and Customs (from 8 November 1938) (UAP)
Senator Hon George McLeay: Vice-President of the Executive Council (from 7 November 1938) (UAP)
Hon Geoffrey Street, MP: Minister for Defence (from 7 November 1938) (UAP)
Hon Eric Harrison, MP: Minister without portfolio, administering external territories (from 8 November 1938) (UAP)
