Peter Dunn may refer to:

• Peter Dunn (author) (born 1977), American financial author and radio host
• Peter Dunn (cricketer) (1921–2004), Australian cricketer
• Peter Dunn (engineer) (1927–2014), British engineer
• Peter Dunn (general) (born 1947), Australian general and ACT Emergency Services Commissioner
• Peter Dunn (historian), Australian historian
• Peter Dunn (paediatrician) (born 1929), British paediatrician
• Peter Dunn (politician) (born 1935), South Australian politician
• Peter Dunn (rugby union) (1936–2019), Australian rugby union player

• Pete Dunn, baseball coach
• Peter Dunne (disambiguation)