California State Soccer Association-South "Cal South"​ | 2,869 followers on LinkedIn. Excellence in Soccer | The California State Soccer Association - South (Cal South) is a 501c(3) California public benefit corporation and is the official youth and adult state soccer association of the United States Soccer Federation and United States Youth Soccer. Cal South represents over 300 Member Leagues and Clubs comprising our membership of more than 200,000 registered players, coaches, referees and league administrators. The organization, with a service area that extends from San Luis Obispo to San Diego, provides rewarding recreational & competitive opportunities for players of all ages, genders and skill levels.