The Governing Bodies of Cornhole
There are two organizations that define (almost identical) rules and regulations for cornhole, and promote and run cornhole tournaments across the country: the American Cornhole Organization (ACO) and the American Cornhole League (ACL).
Both award points for participating in their events, and hold regional and national championships. Generally speaking you only need to worry about playing in one group's events or the other if you are a "pro" as they have rules about competing in each others' events.
American Cornhole League
The American Cornhole League (ACL) promotes and develops cornhole as a sport on every level. The ACL creates and manages special events, advises on the development of outside events, procures equipment for bulk purchases, and educates others on how to position the sport for growth and development.
American Cornhole Organization
American Cornhole Organization, the ACO, is the governing body for the sport of cornhole. Established in 2005 and headquartered in Milford, Ohio, the ACO offers official cornhole rules, sanctioned products, tournament listings, and comprehensive information about cornhole events.