The USPPA is a national 9-ball league system. Information on news, policies, applications, procedures, and upcoming events may be obtained here.

An amateur 8-Ball league with over 70,000 members, founded in 1979, and providing details on league sponsors, events, and schedules, as well as press information.

The BCA has over 45,000 members and supports 8-Ball and 9-Ball formats. There is a considerable library of league-specific information here, including rules, benefits, and membership.

Extensive APA league 8-Ball and 9-Ball rules information may be found here, as well as league benefits, membership, and background.

Official site for the WPBA, providing membership information, television and tour schedules, tournament results, historical articles, contact information, and individual biographies and rankings for members.