US Polo Association Men's Striped Regular Fit Polo U.S. Polo Assn. is the authentic and official brand of the United States Polo Association, the governing body for the sport of polo in the United States since 1890. Today, our products are sold through our licensing program in over 135 countries at independent retail stores, department stores and U.S. Polo Assn. brand stores. The U.S. Polo Assn. brand captures the authenticity of the sport, while embracing the genuine spirit known throughout the world as Classic American Style.