The Broadway League, formerly the League of American Theatres and Producers and League of New York Theatres and Producers, is the national trade association

Trade association

A trade association, also known as an industry trade group, business association or sector association, is an organization founded and funded by businesses that operate in a specific industry...

 for the Broadway theatre

Broadway theatre

Broadway theatre, commonly called simply Broadway, refers to theatrical performances presented in one of the 40 professional theatres with 500 or more seats located in the Theatre District centered along Broadway, and in Lincoln Center, in Manhattan in New York City...

 industry. Its members include theatre owners and operators, producers

Theatrical producer

A theatrical producer is the person ultimately responsible for overseeing all aspects of mounting a theatre production. The independent producer will usually be the originator and finder of the script and starts the whole process...

, presenters, and general managers in New York and more than 250 other North American cities, as well as suppliers of goods and services to the theatre industry.
The League was founded in 1930 as the "League of New York Theatres and Producers".