U.S. Polo Assn. (USPA) is officially sanctioned by the United States Polo Association, the governing body for the sport of polo in the United States since 1890. U.S. Polo Assn. captures the authenticity of the sport while reflecting its rich history, and stays true to its roots in classic American style updated to complement today’s on-the-go lifestyle. Our U.S. Polo Assn. (USPA) online store offers an extensive selection of classically styled, high quality, casual clothing, including denim, khakis, polo shirts, tees.