He was a Progressive Conservative member in the Legislative Assembly of Ontario from 1971 to 1985, and was a cabinet minister in the government of William Davis. Eaton was elected to the Ontario legislature in the 1971 provincial election, defeating New Democratic Party Master in Public Policy Kenneth Bolton by 3,053 votes in Middlesex South. He was re-elected for the redistributed seat of Middlesex in 1975, 1977 and 1981.
He was appointed to Davis"s cabinet as a minister without portfolio on February 13, 1982.
He was appointed to the additional position of Chief Government Whip on July 6, 1983. The Conservatives suffered an electoral setback in the 1985 election under Miller"s leadership.
Eaton was personally defeated, losing to Liberal candidate Doug Reycraft by 810 votes. Cabinet positions
After leaving politics, he continued his farm operation, specializing in Hereford cattle, and launched his a real estate company, Royal LePage Landco Realty, with agents in Woodstock, Ingersoll, London and Saint Thomas.
Eaton served as the President of Woodstock and Ingersoll Real Estate Board.
During his last years, Eaton was an advocate for cancer patients, pushing for cancer drug coverage under OHIP. Eaton died in January 2009, after a battle with cancer. He was 71 years old.
He supported Dennis Timbrell to succeed Davis as party leader in January 1985, and was dropped from cabinet when Frank Miller became Premier of Ontario on February 8, 1985.
He was a member of his local school board from 1964 to 1966, and a director of Missouri Mutual Fire Insurance.