National Professional Soccer League (1984–2001)
| Founded | April 18, 1984 (as AISA)  | 
|---|---|
| Folded | 2001 | 
| Country |  United States  Canada  | 
| Number of clubs | 15 | 
| Last champions | Milwaukee Wave  (2000–01)  | 
The National Professional Soccer League was a professional indoor soccer league in the U.S. and Canada. It was originally called the American Indoor Soccer Association.