1998–99 National Soccer League

The 1998–99 National Soccer League season, known under a sponsorship arrangement as the 1998–99 Ericsson Cup, was the 23rd season of the National Soccer League in Australia.

Overview
It was contested by 15 teams, and South Melbourne won the championship. Northern Spirit FC entered the competition.

Elimination finals

 * Northern Spirit 0-0 : 1-2 Marconi Stallions
 * Adelaide City 0-0 : 1-2 Perth Glory

Major semi-final

 * South Melbourne 2-1 : 0-0 Sydney United

Minor semi-final

 * Perth Glory 1-0 Marconi Stallions

Preliminary final

 * Sydney United 2-1 Perth Glory