Detlefsen

Detlefsen is a surname. Notable people with the surname include:
 * Linda Detlefsen (born 1962), American middle-distance runner
 * Michael Detlefsen (1948–2019), American philosopher
 * Paul Detlefsen (1899–1986), Danish-born American commercial artist
 * Otto Detlefsen (1880s–1963), Danish opera singer