The purpose of the Lancaster-Lebanon Athletic Association (the LL League) is to promote student athletics in an educational atmosphere, fostering sportsmanship and protecting and ensuring the welfare of student athletes who participate in athletic leagues sponsored by the LL League. The LL League functions as a formal governing body to establish rules and regulations and to make recommendations for organizing and conducting athletic events under the guidelines of the PIAA.

Established in 1972, the LL League is comprised of 24 member schools (with 2 Associate member schools).  Currently the LL League oversees competition in 16 different sports, awarding 23 different League Championships each year.