Cromer is a surname. Notable people with the surname include:
D. T. Cromer, (born 1971), American former baseball player David Cromer, American stage actor and theatre director Don T. Cromer, American radiation physicist, Ernest Orlando Lawrence Award laureate George Cromer (died 1543), Archbishop of Armagh and Primate of All Ireland George W. Cromer (1856–1936), U.S. Representative from Indiana Giulio Cromer (died 1632), an Italian painter Greg Cromer (born 1958), American politician Ronnie W. Cromer (born 1947), Republican member of the South Carolina Senate Tripp Cromer (born 1967), former American Major League baseball player Walter Cromer (fl. 1543), Scottish doctor