Joseph Duncan

Joseph or Joe Duncan may refer to:


 * Joseph Duncan (politician) (1794–1844), sixth Governor of the state of Illinois (1834–1838)
 * Joseph Alfred Duncan (born 1993), Ghanaian footballer
 * Joseph Edward Duncan (1963–2021), American convicted serial killer and child molester
 * Joseph Forbes Duncan (1879–1964), Scottish trade unionist and politician
 * Joe Duncan (baseball), American baseball player
 * Joe Don Duncan (born 1990), American football player