Steffen is a surname and given name, and may refer to:
Surname 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 Clare E. Steffen (b. 1954), American psychologist David Steffen, American businessman and politician Hans Steffen (1865–1937), German geographer and explorer of Patagonia Jason Steffen (b. 1975), American physicist Jim Steffen (1936–2015), American football player Kai Steffen (born 1961), German football player Konrad Steffen (1952-2020), Swiss glaciologist and Arctic climate researcher Niklas Steffen (born 2001), Swiss footballer Otto Steffen (b. 1874, d. unknown), American Olympic gymnast Renato Steffen (born 1991), Swiss football player Sonja Steffen (b. 1963), German politician Thomas L. Steffen (1930–2020), American judge Till Steffen (born 1973), German lawyer and politician 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 football player William L. Steffen (1947–2023), Australian climate science expert and researcher Zack Steffen (born 1995), American soccer player
Given name
Steffen Dittes (born 1973), German politician Steffen Freiberg (born 1981), German politician Steffen Frølund (born 1984), Danish politician Steffen Grosse (born 1967), German politician Steffen Holme Helledie (born 1989), Danish politician Steffen Jürgens (born 1967), German actor and film director Steffen Larsen (born 1983), Danish politician Steffen Møller (born 1977), Danish engineer Steffen Roth (born 1976), German academic Steffen Schütz (born 1966), German politician Steffen Tangstad (1959–2024), Norwegian boxer
See also Steffen Glacier in the Northern Patagonian Ice Field