Peter Duncan
Peter Duncan may refer to:
- Peter Duncan (actor), former Blue Peter presenter and former UK Chief Scout
- Peter Duncan (British politician), Scottish Conservative Party politician, former Member of Parliament
- Peter Duncan (Australian politician), former member of the South Australian and Federal parliaments
- Peter Duncan (director), Australian filmmaker
- Peter Duncan (alpine skier), Canadian skier
- Peter Duncan (swimmer), South African Olympic swimmer
- Peter Duncan (footballer), Scottish football inside left
- Peter Martin Duncan, English palaeontologist