Ceil Lucas (born March 19, 1951) is an American linguist.
Lucas is a professor emerita of Gallaudet University.
Lucas was a professor in the Department of Linguistics at Gallaudet University until her retirement in 2014.
Lucas is currently the editor of Sign Language Studies at Gallaudet University Press, a position she's held since 2009.
Lucas is known for her contributions to the field of linguistics, most notably in the research of American Sign Language.