Mark Stein (born 1951) is an American writer. Raised in Silver Spring, Maryland, he graduated from the University of Wisconsin–Madison in 1973.
Stein wrote the screenplay for the Goldie Hawn and Steve Martin film Housesitter. His stage plays were first produced at New Playwrights Theater of Washington, D.C. From there he went on to productions at Actors Theater of Louisville, Manhattan Theatre Club, South Coast Repertory, the Oregon Shakespeare Festival, the Fountain Theater in Los Angeles, the Royal Manitoba Theatre Centre, and elsewhere.
His non-fiction book, How the States Got Their Shapes, became the basis for a History Channel series by the same name.