David Roach Dowty (born 1945[1]) is a linguist known primarily for his work in semantic and syntactic theory, and especially in Montague grammar and Categorial grammar. Dowty is a professor emeritus of linguistics at the Ohio State University, and his research interests mainly lie in Semantic and Syntactic Theory, Lexical semantics and Thematic roles, Categorial grammar, and Semantics of Tense and Aspect.