Wenman was born in Maidstone, Saskatchewan and attended the University of Saskatchewan and various schools in the United States. In 1966, he became a member of British Columbia's provincial legislature for the Social Credit party, setting a record as youngest MLA at that time.
He was first elected at the Fraser Valley West riding in the 1974 federal election. He was re-elected in that riding four times, in 1979, 1980, 1984 and 1988. He left federal politics after this and did not campaign in the 1993 federal election.
After a long-term bacterial infection contracted during a business trip to Asia, Wenman died a few days before his 55th birthday.
- Robert Wenman – Parliament of Canada biography
- Parliament of Canada: The Late Robert Lloyd Wenman "Hansard (House of Commons debates)" Check
|url=value (help). Parliament of Canada. 19 June 1995. Retrieved 2007-06-24.
- Canadian Press (15 June 1995). "Obituary: Robert Wenman Former B.C. Socred Tory MP for 19 years". Globe and Mail. p. F7.
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