American Amateur Baseball Congress

The American Amateur Baseball Congress (AABC) is an amateur baseball organization in the United States for players from sub-teens through adults. Founded in 1935, it coordinates its programs with USA Baseball and the American Baseball Coaches Association. AABC has eight (8) age-range divisions in the U.S., Puerto Rico, and Canada. There are also five (5) single-age divisions: 9's, 11's, 13's, 15's, and 17's. In some leagues, however, all divisions are age-range and none are single-age.

Under the AABC, each league has at least four (4) teams, each of which plays at least six (6) league games. Each league's winner goes on to state-tournament play. The winner of each state tournament goes to regional play and from there to the world series.