Peter Duncan

Peter Duncan may refer to:


 * Peter Duncan (actor) (born 1954), former Blue Peter presenter and former UK Chief Scout
 * Peter Duncan (British politician) (born 1965), Scottish Conservative Party politician, former Member of Parliament
 * Peter Duncan (Australian politician) (born 1945), former member of the South Australian and Federal parliaments
 * Peter Duncan (director) (born 1964), Australian filmmaker
 * Peter Duncan (alpine skier) (born 1944), Canadian skier
 * Peter Duncan (swimmer) (born 1935), South African Olympic swimmer
 * Peter Duncan (footballer) (1890–1974), Scottish football inside left
 * Peter Martin Duncan (1824–1891), English palaeontologist