The Heartland Sport Horse Association is based in Southwest Missouri and serves the four-state region of Kansas, Oklahoma, Missouri and Arkansas. The Heartland Sport Horse Association is a group member of the United States Dressage Federation. The HSA's main purpose is to help  build a strong foundation of horsemanship by developing and encouraging enjoyable, beneficial, and affordable learning opportunities in the four-state area. HSA offers local dressage and sport horse activities, publishes a monthly newsletter that covers regional USDF activities, and provides regularly scheduled meetings.