'''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
{{Hndis|name=Duncan, Joseph}}