Northrop is a surname. Notable people with the name include:
Ann Northrop (born 1948), American journalist and activist Creig Northrop, American real estate agent and broker Cyrus Northrop (1834–1922), American university president Edward Skottowe Northrop (1911–2003), an American federal judge F. S. C. Northrop (1893–1992), American philosopher George C. Northrop (1819–1874), American politician and banker in Wisconsin Henry Davenport Northrop (1836–1909) American Presbyterian minister, and author Henry P. Northrop (1842–1916), American Roman Catholic bishop Jack Northrop (1895–1981), American aircraft industrialist and designer, founded the Northrop Corporation James Henry Northrop (1856–1940), English inventor John Howard Northrop (1891–1987), American biochemist Lucius B. Northrop (1811–1894), American Confederate States of America colonel Sandy Northrop, American television producer Wayne Northrop (1947–2024), American actor