Andrew Duncan may refer to: Andrew Duncan, the elder (1744–1828), Scottish pioneer for improved institutional care and treatment of mental health problems, founder of Royal Edinburgh Hospital Andrew Duncan, the younger (1773–1832), physician and professor at Edinburgh University Andrew Duncan (mayor) (1834–1880), third mayor of Christchurch, New Zealand Sir Andrew Duncan (businessman) (1882–1952), British businessman, MP and public official Andrew Duncan (poet) (born 1956), British poet Andrew Duncan (rugby league) (born 1972), professional rugby league footballer