The 1998–99 season was the first season in the history of Northern Spirit (now North West Sydney Spirit).
It was also the first season in the National Soccer League.
Northern Spirit finished 5th in their National Soccer League season, and were eliminated in the NSL Finals series elimination-final first round by Marconi Fairfield.
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.
Players may hold more than one non-FIFA nationality.