Lawrence Langner (1890 – 1962) was a playwright, author, and producer who also pursued a career as a patent attorney.
Born near Swansea, South Wales and working most of his life in the United States, he started his career as one of the founders of the Washington Square Players troupe in 1914. In 1919 he founded the Theatre Guild, where he supervised over 200 productions. He was also founder and Chairman of the American Shakespeare Festival, and with his wife, Armina Marshall, he created and operated the Westport Country Playhouse.
Besides theatre, Lawrence Langner wrote several books, including an autobiography, titled Magic Curtain. He was awarded the 1958 Tony Award for best play production (together with his wife and partners, Theresa Helburn and Dore Schary) for Sunrise at Campobello.