New York Theatre Workshop (NYTW) is an Off-Broadway theater noted for its productions of new works. Located at 79 East 4th Street between Second Avenue and Bowery in the East Village neighborhood of Manhattan, New York City, it houses a 198-seat theater for its mainstage productions, and a 75-seat black box theatre for staged readings and developing work in the building next door, at 83 East 4th Street.

An off-Broadway theatre is any professional theatre venue in New York City with a seating capacity between 100 and 499, inclusive. These theatres are smaller than Broadway theatres, but larger than off-off-Broadway theatres, which seat fewer than 100.