Niels Larsen (1889–1969) was a Danish sport shooter.
Niels Larsen may also refer to:
Niels Bjørn Larsen (1913–2003), Danish ballet dancer and choreographer Niels P. Larsen, Danish-American politician Nils Larsen (pianist) (1888–1937), Norwegian pianist and composer
See also Niels Larsen Bruun (1893–1970), Norwegian admiral Niels A. Lassen (1926–1997), Danish physician and neurologist Niels Lassen (farmer) (–1811), Danish farmer Niels Larsen Stevns (1864–1941), Danish painter and sculptor