Year-by-year attendance figures for the American Indoor Soccer Association (AISA), which later became the National Professional Soccer League. As you can see, I’m missing some team information. If you can fill in the blanks, please let me know. These numbers may differ from even official league publications, as a team of researchers has gone back and recalculated the totals based on game-by-game attendance figures.
| Team | G | Total | Avg. |
| Milwaukee Wave | 20 | 147,370 | 7,369 |
| Atlanta Attack | **18 | 110,508 | 6,139 |
| Chicago Power | 20 | 72,043 | 3,602 |
| Hershey Impact | #16 | 55,546 | 3,472 |
| Dayton Dynamo | 20 | 51,454 | 2,573 |
| Canton Invaders | *19 | 47,622 | 2,506 |
| Indiana Kick | 20 | 46,480 | 2,324 |
| Memphis Rogues | *19 | 31,383 | 1,652 |
| AISA TOTAL | 136 | 524,778 | 3,859 |
| *Missing one game *Missing two games #Missing four games |
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| Team | G | Total | Avg. |
| Milwaukee Wave | 20 | 128,842 | 6,442 |
| Chicago Power | *17 | 66,041 | 3,885 |
| Fort Wayne Flames | 20 | 74,840 | 3,742 |
| Hershey Impact | 20 | 68,802 | 3,440 |
| Dayton Dynamo | 20 | 43,153 | 2,158 |
| Canton Invaders | 20 | 42,772 | 2,139 |
| Memphis Storm | 20 | 40,951 | 2,048 |
| AISA TOTAL | 137 | 465401 | 3,397 |
| *Missing three games | |||
| Team | G | Total | Avg. |
| Memphis Storm | 12 | 36,403 | 3,034 |
| Milwaukee Wave | 12 | 34,255 | 2,855 |
| Canton Invaders | 12 | 26,521 | 2,460 |
| Ft. Wayne Flames | 12 | 23,414 | 1,951 |
| AISA TOTAL | 48 | 123,593 | 2,575 |
| Team | G | Total | Avg. |
| Memphis Storm | 21 | 73,207 | 3,486 |
| Canton Invaders | 21 | 69,183 | 3,294 |
| Ft. Wayne Flames | 21 | 47,647 | 2,269 |
| Milwaukee Wave | 21 | 48,641 | 2,316 |
| Louisville Thunder | 20 | 43,732 | 2,187 |
| Tampa Bay Rowdies | 21 | 43,015 | 2,048 |
| Toledo Pride | 21 | 39,107 | 1,862 |
| Chicago Shoccers | 21 | 38,847 | 1,850 |
| AISA TOTAL | 167 | 403,379 | 2,415 |
| Team | G | Total | Avg. |
| Canton Invaders | 20 | 58,260 | 2,913 |
| Louisville Thunder | 20 | 56,527 | 2,826 |
| Milwaukee Wave | 20 | 36,043 | 1,802 |
| Kalamazoo Kangaroos | 20 | 34,014 | 1,701 |
| Columbus Capitals | 20 | 27,717 | 1,386 |
| Chicago Shoccers | *13 | 16,064 | 1,236 |
| AISA TOTAL | 113 | 228,625 | 2,023 |
| *Missing seven games. Later league publications listed Chicago’s total attendance at 19,697 for an average of 985. | |||
| Team | G | Total | Avg. |
| Canton Invaders | 20 | 46,515 | 2,326 |
| Milwaukee Wave | 20 | 42,105 | 2,105 |
| Kalamazoo Kangaroos | 20 | 41,657 | 2,083 |
| Louisville Thunder | 20 | 39,484 | 1,974 |
| Columbus Capitals | 20 | 27,559 | 1,378 |
| Chicago Vultures | 20 | 10,033 | 502 |
| AISA TOTAL | 120 | 207,353 | 1,728 |