Michael O'Donnell

Michael O'Donnell may refer to:


 * Michael O'Donnell (physician) (1928–2019), British doctor, journalist, author, and broadcaster
 * Michael O'Donnell (Kansas politician) (born 1985), American researcher, and lecturer
 * Michael E. O'Donnell, American biochemist
 * Michael O'Donnell (rugby league), New Zealand former professional rugby league footballer
 * Michael A. O'Donnell, American writer and researcher
 * Michael O'Donnell (Missouri politician), politician in Missouri