Peter Cartwright (revivalist) (1785–1873), American revivalist and politician
Peter Cartwright (New Zealand), husband of the former Governor-General of New Zealand, Silvia Cartwright, and chair of the Broadcasting Standards Authority
Peter Cartwright (actor) (1935–2013), South African-born British actor
Peter Cartwright (footballer) (born 1957), English footballer
Peter Cartwright (film editor) on The Angelic Conversation