Mark Cleland Baker (born 1959) is an American linguist.

He received his Ph.D. from MIT in 1985 and has taught at Rutgers University since 1998.

Baker frequently was a faculty member at the Linguistic Society of America's Summer Institute and, prior to coming to Rutgers, was a faculty member at McGill University (1986–1998).

He worked with the Mohawk language for several years, also serving as a consultant on language revitalization for the Mohawk.

Working within generative grammar, he has written several books about the formal analysis of polysynthetic languages.