Niels Petersen may refer to:
Niels Petersen (gymnast) (1885–1961), Danish Olympic gymnast Niels Helveg Petersen (1939–2017), Danish politician Niels Petersen (sport shooter) (born 1932), Danish former sport shooter Niels Petersen (weightlifter) (born 1918), Danish weightlifter Niels Petersen (1845–1923), Danish pioneer of the town of Tempe, Arizona and owner of the historic Niels Petersen House