James Brown Mabon (July 16, 1865 – March 10, 1941) was an American banker who served as president of the New York Stock Exchange.
Kingsley later retired from the firm and became chairman of the board of the United States Trust Company.
[6] He served on most of the important committees of the Exchange in a period of twenty-nine years, and at various times was chairman and trustee of the gratuity fund, director and president of the New York Quotation Company, and director of president of the New York Stock Exchange Safe Deposit Company.
[10] On January 6, 1898, Mabon was married to Elise Howell Smith (1875–1961) at the Collegiate Church at West End and 77th Street in New York.
[1][19] His widow, who was then living at 570 Park Avenue, died at Litchfield County Hospital in Winsted, Connecticut in May 1961.