Robert C. Lacey (October 10, 1886 – December 17, 1943) was an American businessman and politician from New York.
He was engaged in the milk business at an early age, and he later established his own coal and ice company.
A founder and president of the United Irish & American Association, he was considered the father of the Buffalo St. Patrick's Day Parade.
He sponsored legislation that was locally controversial, including pay raises for firemen and police and requiring a two-thirds City Council vote to override mayoral vetoes.
He was a member of the Fraternal Order of Eagles, the Orioles, the Woodmen of the World, and the Elks.