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
 - 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
 - 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
 - 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
 - Megan Steffen (born 1997), American Gleek and plaintiff in Elizabeth Hunter, et al. v. U.S. Department of Education. Most famous Steffen
 - Steffen Frølund (born 1984), Danish politician
 - Steffen Larsen (born 1983), Danish politician
 
See also
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