Mast is a surname. Notable people with the surname include:
Austin Mast (born 1972), American botanist Brian Mast (b. 1980), American Florida congressman Dennis Mast (born 1992), German footballer Dick Mast (born 1951), American professional golfer Emily Mast (born 1976), American artist Günter Mast, German manager Katja Mast (born 1971), German politician Maura Mast, Irish-American mathematician Peggy Mast (fl. 20th/21st century), American politician Rick Mast (born 1957), American NASCAR driver Wilhelm Mast, founder of Mast-Jägermeister
Mast is also a given name, and may refer to: Mast Ali, Indian actor