The National Basketball Association (NBA) is the world's premier men's basketball league. It has 30 teams; 29 in the United States and 1 in Canada. It is an active member of USA Basketball (USAB), which is recognized by the International Basketball Federation as the National Governing Body (NGB) for basketball in the United States. The NBA is one of the four major North American professional sports leagues.

The league was founded in New York City, on June 6, 1946 as the Basketball Association of America (BAA). The league adopted the name National Basketball Association in the autumn 1949 after merging with the rival National Basketball League. The league's several international and individual team offices are directed out of its head offices located in the Olympic Tower at 645 Fifth Avenue in New York City. NBA Entertainment and NBA TV studios are directed out of offices located in Secaucus, New Jersey.