Mogensen is a surname of Danish origin which may refer to:
People Allan Mogensen, Danish orienteering competitor, winner of the 1993 World Orienteering Championship Andreas Mogensen (born 1976), first Dane selected as astronaut by the European Space Agency Annette Mogensen (born 1959), Danish footballer Børge Mogensen (1914–1972), Danish furniture designer Brock Mogensen (born 2000), American football player Carsten Mogensen (born 1983), male badminton player from Denmark Grete Mogensen, retired female badminton player from Denmark Gustav Mogensen (born 2001), Danish professional footballer Halldóra Mogensen (born 1979), Icelandic politician Hans Mogensen, or Mogenssøn (about 1525–1595), Danish priest Joëlle Mogensen (1953–1982), popular singer of French songs John Mogensen (1928–1977), Danish singer, songwriter and pianist Thomas Mogensen (born 1983), Danish team handball player
Other Mogensen-Scott encoding, a way to embed inductive datatypes in the lambda calculus