Maslin is a surname. Notable people with the surname include:

• Bruce Maslin (born 1946), Australian botanist
• Jamie Maslin, British author
• Janet Maslin (born 1949), American journalist
• Martin Maslin (born 1942), English cricketer
• Mikhail Maslin (born 1947), Russian historian of philosophy
• Sue Maslin, Australian film producer
• Mark Maslin, Earth system scientist
• William Maslin (1848–1924), New Zealand politician

• Maslin is a synonym for mixed intercropping

• Maslin Beach, South Australia
• Maslin, type of bread; see Rye bread#Multigrain