Leagues

North America
National Indoor Soccer League (United States and Mexico) (formed from former MISL and AISL teams)
Professional Arena Soccer League (United States, Canada, and Mexico)
Xtreme Soccer League (United States) (formed from former MISL teams)

Europe
Campeonato Nacional de Liga de Fútbol Indoor (Spain)
Netbusters Soccer Leagues (United Kingdom)
Former
American Indoor Soccer League (United States)
Continental Indoor Soccer League (United States and Mexico)
Eastern Indoor Soccer League (United States)
Major Indoor Soccer League (United States and Mexico)
Major Soccer League (originally called the Major Indoor Soccer League)
National Professional Soccer League II (originally called the American Indoor Soccer Association)
National Soccer League (never played a game; not to be confused with the NISL)
North American Soccer League (indoor and outdoor soccer league)
Southwest Indoor Soccer League (evolved into the outdoor USL)
World Indoor Soccer League (Originally the Premier Soccer Alliance)