Lydia R. Diamond (born April 14, 1969 in Detroit, Michigan) is an American playwright and professor. Among her most popular plays are The Bluest Eye (2007), an adaptation of Toni Morrison's novel; Stick Fly (2008); Harriet Jacobs (2011); and Smart People (2016). Her plays have received national attention and acclaim, receiving the Lorraine Hansberry Award for Best Writing, an LA Weekly Theater Award, a Los Angeles Drama Critics Circle Award and the 2020 Horton Foote Playwriting Award from the Dramatists Guild of America.