Ken or Kenneth Duncan may refer to:

• Ken Duncan (photographer) (born 1954), Australian photographer
• Ken Duncan (politician) (born 1945), Louisiana state treasurer
• Ken Duncan (American football) (born 1946), punter in the National Football League
• Kenne Duncan (1903–1972), Canadian-born B-movie character actor
• Kenneth Forrest Duncan (1881–1952), public servant and political figure in British Columbia
• Kenneth Charles Duncan, Australian architect
• Sandy Duncan (athlete) (1912–2005), English sprinter

Topics referred to by the same term

This disambiguation page lists articles about people with the same name.
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