|Preceded by||Harry Parrott|
|Succeeded by||Charlie Tatham|
|Born||July 11, 1934|
|Political party||Progressive Conservative Party|
Richard L. Treleaven (born July 11, 1934) is a former politician in Ontario, Canada. He served in the Legislative Assembly of Ontario from 1981 to 1987, as a member of the Progressive Conservative Party.
Treleaven was born in Goderich, Ontario, He was educated at the University of Western Ontario and the Osgoode Law School. He obtained a Bachelor of Laws degree, and worked as a barrister and solicitor. He was also a member of the Waterloo-Wellington Hunt Club, and coach of the Woodstock Y Swim Team.
He was elected to the Ontario legislature in the 1981 provincial election, defeating Liberal Party candidate John Finlay by 4,082 votes in Oxford. For the next four years, he served as a backbench supporter of the Bill Davis and Frank Miller administrations.
The Progressive Conservatives were reduced to a tenuous minority government under Miller's leadership in the 1985 provincial election and Treleaven was re-elected in Oxford. He was named as Deputy Speaker of the Assembly on June 6, 1985. He retained his position after Miller's government was defeated in the house, and the Liberals formed government under David Peterson. In 1986, he was a prominent opponent of Peterson's plan to ban extra billing by Ontario doctors.
- "Oxford". Ontario Votes 2003. Canadian Broadcasting Corporation. 2003. Retrieved 19 March 2011.
- Normandin, Pierre G.; Normandin; A. Léopold (1987). The Canadian parliamentary guide. Ernest J. Chambers. Retrieved 18 March 2011.
- Canadian Press (1981-03-20). "Winds of change, sea of security". The Windsor Star. Windsor, Ontario. p. 22. Retrieved 2014-04-01.
- "Results of vote in Ontario election". The Globe and Mail. May 3, 1985. p. 13.
- William Walker (19 May 1987). "Election call may kill Ontario's information bill All-party agreement sought for vote today". Toronto Star.
- "Results from individual ridings". The Windsor Star. September 11, 1987. p. F2.