Michael John Clyde Ronaldson (born 13 February 1954) is a former Australian politician. He was a Senator for the state of Victoria representing the Liberal Party from July 2005 until February 2016, and previously served in the House of Representatives for Ballarat from 1990 to 2001. Ronaldson served as the Minister for Veterans' Affairs, the Minister Assisting the Prime Minister for the Centenary of ANZAC, and the Special Minister of State in the Abbott government from 2013 to 2015.^[1][2]

Ronaldson was born in Ballarat, Victoria and attended Ballarat College before studying law at the University of Melbourne. Admitted to the Bar, Ronaldson practised as a barrister and solicitor in Ballarat before entering politics. In 1981, Ronaldson was elected to the Ballarat City Council, where he served two terms as a councillor.

A member of the Liberal Party since 1980, Ronaldson was elected to the House of Representatives for the seat of Ballarat in 1990.

His election, along with several other Victorian MHRs first elected in March 1990, was largely a result of a protest vote swing against the Labor (John Cain) state government of the time. At his election, he held the seat with a margin of 1.9%.

His grandfather, Archibald Fisken, was the member for Ballarat from 1934 until 1937.^[3] During his time in the House of Representatives, Ronaldson served as the Shadow Minister for Youth, Sport and Recreation, Shadow Parliamentary Secretary to the Leader of the Opposition and Shadow Minister for Schools, Vocational Education and Training.

Following the election of the Howard government at the 1996 federal election, Ronaldson was appointed a Parliamentary Secretary to the Minister for Transport and Regional Development. After the 1998 election he was appointed Chief Government Whip.

Following his retirement from the House of Representatives at the 2001 election, Ronaldson was a consultant and member of a number of boards including Snowy Hydro Limited. He was co-chair of the Australian Ex-Prisoners of War Memorial project in Ballarat where he assisted with fundraising. He served on the Administrative Committee of the Liberal Party of Australia (Victorian Division) from 2001 to 2004. Ronaldson has been a member of the Liberal Party for more than 30 years.

Ronaldson was appointed to the board of Australia Post in May 2016.^[9] He was board member of the Oliver Foundation from 2018, Director of the State Sports Centre Trust (Victoria) from 2020 to 2021, and chairman of the board at InnoWell Pty Ltd.^[10]

Ronaldson has been married to Cate Ronaldson since 1983, and has three children.^[11]

He survived a bout with kidney cancer in 1996.^[12]