De Graff may refer to: People Arthur C. DeGraff (1899–1983), American cardiologist Geoffrey de Graff (born 1949), secular name of American monk Ṭhānissaro Bhikkhu John I. De Graff (1783-1848), U.S. Representative from New York Laurens de Graaf (1653-1704), a Dutch pirate Places In the United States: De Graff, Kansas, an unincorporated place in Butler County, Kansas De Graff, Minnesota, a city in Swift County, Minnesota, United States De Graff, Ohio, a village located in Logan County, Ohio, United States