Isaac Sears (1 July 1730 – 28 October 1786) was an American merchant, sailor, Freemason, and political figure who played an important role in the American Revolution. He was born July 1, 1730 at West Brewster, Massachusetts, the son of Joshua and Mary Sears. He was a descendant of Richard Sears, who emigrated to the colonies from Colchester, England, in 1630. While he was a child, the family moved to Norwalk, Connecticut.