Aslin is an English surname, from the Norman name Asceline. Åslin is an unrelated Swedish locational surname, from ås "ridge". Notable people with the surnames include:
Aiden Aslin (born 1994), British foreign volunteer Charles Herbert Aslin (1893–1959), British architect David Åslin (born 1989), Swedish ice hockey player Elizabeth Mary Aslin (1923–1989), English art historian, administrator, author and lecturer Peter Åslin (1962–2012), Swedish ice hockey goaltender Richard N. Aslin (born 1949), American psychologist