The Second Lyons Ministry was the twenty-second Australian Commonwealth ministry, and ran from 12 October 1934 to 9 November 1934.

United Australia Party

• Rt Hon Joseph Lyons, MP: Prime Minister, Treasurer
• Senator Rt Hon Sir George Pearce, KCVO: Minister for External Affairs, Minister in charge of Territories
• Hon Archdale Parkhill, MP: Minister for Defence
• Hon Charles Marr, MP: Minister without portfolio
• Senator Hon Alexander McLachlan: Postmaster-General, Minister in charge of Development and Scientific and Industrial Research
• Hon Josiah Francis, MP: Minister in charge of War Service Homes, Minister assisting the Minister for Repatriation
• Hon Frederick Stewart, MP: Minister for Commerce
• Hon Thomas White, MP: Minister for Trade and Customs
• Hon Richard Casey, MP: Assistant Treasurer
• Hon Robert Menzies, KC MP: Attorney-General, Minister for Industry
• Hon Eric Harrison, MP: Minister for the Interior
• Rt Hon Billy Hughes, KC MP: Vice-President of the Executive Council, Minister for Health, Minister for Repatriation
• Hon Sir Henry Somer Gullett, KCMG MP: Minister without portfolio
• Senator Hon Tom Brennan, KC: Minister without portfolio