The National Negro Business League (NNBL) was an American organization founded in Boston in 1900 by Booker T. Washington, with the support of Andrew Carnegie. The mission and main goal of the National Negro Business League was "to promote the commercial and financial development of the Negro." It was recognized as "composed of negro men and women who have achieved success along business lines". It grew rapidly with In 320 chapters in 1905 and more than 600 chapters in 34 states in 1915.