The Off-Broadway League was founded in 1959 to foster theatrical productions produced in Off-Broadway theatres, to assist in the voluntary exchange of information among its members, and to serve as the collective voice of its membership in pursuit of these goals. 

Any person or business entity engaged as an Off-Broadway theatre owner or operator, theatre manager or producer or manager of a production in an Off-Broadway theatre (100-499 seats) may apply for membership. Labor Members of The Off-Broadway League are obligated to abide by the collective bargaining agreements currently in place with AEA, SDC and USA.