John Groppo (August 14, 1921 – June 12, 2013) was an American mason contractor, businessman, and politician. Born in Winsted, Connecticut, Groppo served in the United States Marine Corps during World War II. He was a stonemason and was the owner of Leo Groppo & Son Mason Contractors. He served as mayor of Winsted, Connecticut 1965 to 1967. From 1959 to 1985 he served in the Connecticut House of Representatives as a Democrat and was majority leader. In 1985–1987, Groppo was commissioner of the Connecticut Department of Revenue Services. He died in Winsted, Connecticut.'Native Winsted and Democrat leader John Groppo Dies at 92,' The Register Citizen (Connecticut), June 14, 2013

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1921 births 2013 deaths People from Winsted, Connecticut Businesspeople from Connecticut Mayors of places in Connecticut Democratic Party members of the Connecticut House of Representatives 20th-century American businesspeople United States Marine Corps personnel of World War II {{Connecticut-politician-stub