Peter Nielsen
Peter Nielsen may refer to:
Sports
- Peter Nielsen (footballer), Danish footballer
- Peter Nielsen (sport shooter), Danish Olympic shooter; see Shooting at the 1912 Summer Olympics – Men's 50 metre pistol
- Peter Heine Nielsen, Danish chess grandmaster
- Peter Meinert Nielsen, Danish road bicycle racer
Others
- Peter Nielsen (actor), Danish film actor
- Peter Nielsen (botanist), Danish botanist, mycologist and plant pathologist
- Peter E. Nielsen, Danish biochemist and inventor of Peptide nucleic acid
- Peter Alsing Nielsen, Danish painter
- Peter Nielsen (air traffic controller), 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''