John Groppo

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.