Winthrop is a surname. Notable persons with that surname include:
Beekman Winthrop (1874–1940), New York lawyer and Governor of Puerto RicoClara Winthrop (1876–after 1935), American philanthropistJohn Winthrop (c. 1587–1649), founding governor of the Massachusetts Bay ColonyJohn Winthrop, the Younger (1606–1676), governor of ConnecticutJohn Winthrop (educator) John Winthrop (1714–1779), American astronomer and professor at Harvard CollegeRobert Charles Winthrop (1809–1894), American lawyer and philanthropistTheodore Winthrop (1828–1861), American writer, lawyer, and world travellerThomas L. Winthrop (1760–1841), American Lieutenant Governor of Massachusetts