Peter Nielsen

Peter Nielsen may refer to:

Sports

 * Peter Nielsen (footballer) (born 1968), Danish footballer
 * Peter Nielsen (sport shooter) (1890–1972), Danish Olympic shooter; see Shooting at the 1912 Summer Olympics – Men's 50 metre pistol
 * Peter Heine Nielsen (born 1973), Danish chess grandmaster
 * Peter Meinert Nielsen (born 1966), Danish road bicycle racer

Others

 * Peter Nielsen (actor) (1876–1949), Danish film actor
 * Peter Nielsen (botanist) (1829–1897), Danish botanist, mycologist and plant pathologist
 * Peter E. Nielsen, Danish biochemist and inventor of Peptide nucleic acid
 * Peter Alsing Nielsen (1907–1985), Danish painter
 * Peter Nielsen (air traffic controller) (died 2004), Danish-born Swiss air traffic controller at the time of the 2002 Überlingen mid-air collision]
 * Peter Nielsen, contestant on series four of the Irish TV series The Apprentice