Michael Barrett may refer to:

Politicians

• Michael J. Barrett (born 1948), American politician in Massachusetts
• Michael Barrett (Irish politician) (1927–2006), Irish Fianna Fáil politician
• Michael Barrett (Canadian politician) (born 1984), Canadian Member of Parliament from Ontario

Sportsmen

• Mike Barrett (footballer) (1959–1984), English footballer
• Mike Barrett (sportscaster) (born 1968), American sportscaster
• Mike Barrett (basketball) (1943–2011), American basketball player
• Michael Barrett (baseball) (born 1976), American baseball player
• Michael Barrett (American football) (born 1999), American football player

Others

• Michael Barrett (cinematographer) (born 1970), American cinematographer
• Michael Barrett (Fenian) (1841–1868), hanged for his alleged role in the Clerkenwell bombing
• Michael Barrett (physician) (1816–1887), British-Canadian physician and teacher
• Michael Barrett (author) (1924–1999), Australian fiction author of The Invincible Six
• Michael B. Barrett (born c. 1946), American Army Brigadier General and former assistant professor of history at The Citadel
• Michael R. Barrett (born 1951), American judge
• Michael David Barrett (born 1962), stalker of TV personality Erin Andrews
• Michael Barrett (theologian) (born 1949), American academic dean and professor of Old Testament
• Michael Barrett (scientist) (born 1964), Professor of Biochemical Parasitology