Steffen is a surname and given name, and may refer to:
Albert Steffen (1884–1963), Swiss poet, painter, and novelist
Alex Steffen (b. 1968), American writer and environmental futurist
Anthony Steffen (1929–2004), Brazilian actor; acted in many spaghetti westerns
Britta Steffen (b. 1983), German Olympic swimmer
David Steffen, American businessman and politician
Hans Steffen (1865–1937), German geographer and explorer of Patagonia
Steffen Glacier in the Northern Patagonian Ice Field
Jim Steffen (b. 1936), American professional football player
Konrad Steffen, glaciologist
Otto Steffen (b. 1874, d. unknown), American Olympic gymnast
Waldemar Steffen (b. 1872, d. unknown), German Olympic track and field athlete
Walter Steffen (1886–1937), American professional football player
Willi Steffen (1925–2005), Swiss professional football player
William L. Steffen, Australian climate science expert and researcher
Kai Steffen, German professional football player
