Ian McDonald may refer to:Ian McDonald (1936−2019), Ministry of Defence spokesman during the Falklands War
Ian McDonald (musician) (1946−2022), member of King Crimson, 1969−70, and Foreigner, 1977−79
Iain Matthews, previously known as Ian McDonald, member of Fairport Convention
Ian McDonald (cricketer) (1923−2019), Australian cricketer
Ian McDonald, Scottish football midfielder with Darlington
Ian McDonald, English football midfielder with York City and Aldershot, among others
Ian McDonald, Scottish football midfielder with Partick Thistle and Greenock Morton, among others
Ian McDonald, Caribbean-born writer
Ian McDonald, British science fiction novelist
Ian Donald Roy McDonald (1898−1920), World War I flying ace
W. Ian McDonald (1933−2006), New Zealand neurologist, academic, and specialist in multiple sclerosis
