Gerald Wayne Joseph Mercier (born November 7, 1942) is a politician in Manitoba, Canada. He was a member of the Legislative Assembly of Manitoba from 1977 to 1988, and was a cabinet minister in the Progressive Conservative government of Sterling Lyon.
The son of Gerard Mercier, On one occasion, he served as Chair of the city's Works and Operation Committee. In 1966, he married Merryl-Lee Wood.
In the 1977 provincial election, Mercier was elected in the central Winnipeg riding of Osborne The Progressive Conservatives won a majority government in this election, and on October 24, 1977, Mercier was appointed Attorney General, Minister of Municipal Affairs and Minister of Urban Affairs. The latter two positions were merged as one ministry on October 20, 1978, and were separated again on November 15, 1979, when Mercier was named Urban Affairs minister and Government House Leader. He also had responsibility for the Liquor Control Act between October 20, 1978, and 1981. Notwithstanding the changes in name, Mercier had essentially the same responsibilities through the entirety of the Lyon government.
Lyon's government was defeated in the 1981 election, although Mercier successfully sought re-election in the safe Tory seat of St. Norbert rather than in the marginal Osborne riding. He was re-elected in the 1986 election.