Lydia R. Diamond (b. Detroit, Michigan, April 14, 1969) is an American playwright. Her plays include: Here I Am…See Can You Handle It; The Inside, adapted from the poems of Nikki Giovanni; Stage Black; The Gift Horse; Stick Fly; Voyeurs de Venus; The Bluest Eye, adapted from Toni Morrison‘s novel; and Harriet Jacobs, adapted from Incidents in the Life of a Slave Girl. Her play Stick Fly was produced on Broadway at the Cort Theatre on November 18, 2011. The producers include musician Alicia Keys, filmmaker Reuben Cannon and legendary Broadway producer Nelle Nugent.

She holds a B.A. in Theatre and Performance Studies from Northwestern University and has taught at Loyola University, Columbia College, Boston University and with Chicago Dramatists Outreach Program.