Michael or Mike Foster may refer to:

• Michael Foster (American writer) (1904–1956), novelist, journalist, and cartoonist
• Michael Foster (agent) (born 1958), British former talent agent and political candidate
• Michael Foster (musician) (born 1964), American drummer of the rock band FireHouse
• M. A. Foster (Michael Anthony Foster, 1939–2020), American author/writer
• Michael Lewis Foster, American filmmaker

• Mike Foster (American politician) (1930–2020), American politician
• Michael Foster (Hastings and Rye MP) (born 1946), British politician
• Mike Foster (Worcester MP) (born 1963), British politician
• Mike Foster (Canadian politician), of Toronto, Ontario
• Michael Abu Sakara Foster, Ghanaian agronomist and politician

• Michael Foster (cricketer, born 1972), English cricketer
• Michael Foster (cricketer, born 1973), Australian cricketer
• Michael Foster (cricketer, born 1979), former English cricketer
• Mike Foster (footballer) (born 1939), English footballer
• Michael Foster (footballer) (born 1985), Papua New Guinean midfielder
• Michael G. Foster (1940–2021), founder of Yoshukai International karate
• Michael Foster Jr. (born 2003), American basketball player

• Michael Foster (English judge) (1689–1763), English judge
• Michael Foster (physiologist) (1836–1907), British physiologist and member of parliament (MP)
• Michael Foster (philosopher) (1903–1959), tutor in philosophy at Oxford University
• Michael John Foster (scoutmaster) (born 1952), British Scout leader and Anglican priest
• Michael Foster (folklorist), American folklore professor
• Michael Foster (Tolkien scholar) (1946–2023), emeritus professor of English and Tolkien scholar
• Mike Foster, American activist, co-founder of XXXchurch.com

• Michael Forster (disambiguation)
• Michael John Foster (disambiguation)