The United States Tennis Association (USTA) is the national governing body for the sport of tennis and the recognized leader in promoting and developing the sport's growth at every level in the United States, from local communities to the crown jewel of the professional game, the US Open. Established in 1881, the USTA is a progressive and diverse not-for-profit organization whose volunteers, professional staff, and financial resources support a single mission: to promote and develop the growth of tennis. The USTA is the largest tennis organization in the world, with 17 geographical sections, more than 700,000 individual members and 7,000 organizational members, thousands of volunteers and a professional staff dedicated to growing the game.