Nils Christensen or Kristensen may refer to:
Nils Christensen (aviator) (1921–2017), Norwegian-Canadian aviator Nils Christensen Ringnæs (1792–1863), Norwegian politician Nils Reinhardt Christensen (1919–1990), Norwegian film director and screenwriter Nils Christiansen (1913–1988), Filipino swimmer Niels Christiansen (born 1966), Danish businessman, CEO of Lego Niels Christensen (1865–1952), Danish-American inventor Niels Christian Christensen, (1881–1945), Danish sport shooter Niels Kristensen (born 1988), Danish football midfielder Niels Kristensen (rower) (born 1920), Danish rower