Donnan is a surname. Notable people with the name include:
Christopher B. Donnan, archaeologist Elizabeth Donnan (1883–1955), American historian of the slave trade Frederick G. Donnan (1870–1956), British chemist Geoffrey Donnan, Australian neurologist Harry Donnan (1864–1956), Australian cricketer Jeanie Donnan (1864–1942), Scottish poet Jim Donnan (born 1945), American football player and coach Pauline Donnan (1885–1934), American soprano opera singer William G. Donnan (1834–1908), Iowa politician
See also Donan Donen