| Season: | 1998 |
| Winners: | Rochester Rhinos (1st title) |
| Premiers: | Rochester Rhinos (1st title) |
| League Topscorer: | Mark Baena (24 goals) |
| Nextseason: | 1999 |
The 1998 USISL A-League was an American Division II league run by the United Systems of Independent Soccer Leagues during the summer of 1998.
The Hershey Wildcats advance to the Eastern Conference final.
The Minnesota Thunder advanced 4-2 on aggregate.
The San Diego Flash advance to the Western Conference championship.
The Rochester Rhinos advanced to the finals.
The Minnesota Thunder advanced to the final.
MVP: Darren Tilley
| Rank | Scorer | Club | Goals | Assists | Points |
|---|---|---|---|---|---|
| 1 | Mark Baena | Seattle Sounders | 24 | 5 | 53 |
| 2 | Darren Tilley | Rochester Rhinos | 21 | 6 | 48 |
| 3 | Amos Magee | Minnesota Thunder | 15 | 10 | 40 |
| 4 | Kirk Wilson | El Paso Patriots | 15 | 7 | 37 |
| 5 | Mauro Biello | Montreal Impact | 11 | 13 | 35 |
| 6 | Mike Burke | Charleston Battery | 16 | 2 | 34 |
| Gary Glasgow | New Orleans Storm | 15 | 4 | 34 | |
| Antonio Robles | San Diego Flash | 15 | 4 | 34 | |
| 9 | Yari Allnutt | Rochester Rhinos | 14 | 5 | 33 |
| 10 | Jon Szczepanski | Milwaukee Rampage | 8 | 14 | 30 |
| Jason Cairns | Cincinnati Riverhawks | 8 | 14 | 30 | |
| 12 | Luis Labastida | Albuquerque Geckos | 9 | 11 | 29 |
| John Smith | Nashville Metros | 9 | 11 | 29 | |
| 14 | Patrick Beech | Seattle Sounders | 12 | 4 | 28 |
| Steve Patterson | Orange County Zodiac | 11 | 6 | 28 | |
| Martin Reynders | Nashville Metros | 11 | 6 | 28 | |
| 17 | Giuliano Oliviero | Montreal Impact | 8 | 11 | 27 |
| 18 | Gino DiFlorio | Cincinnati Riverhawks | 12 | 2 | 26 |
| Jimmy Glenn | Rochester Rhinos | 10 | 6 | 26 |