The club finished second on the table in the regular season, and won the first A-League Grand Final, defeating Central Coast Mariners 1–0.

Sydney also represented Oceania at the FIFA Club World Championship 2005 where they were placed fifth.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

All A-League club kits were supplied by Reebok through a sponsorship deal with the A-League, and all clubs initially had a white change strip, Sydney adopting a light blue trim to their away shirts.

The home shirt colour of sky blue adopted the NSW representative colour, contrasted with the navy blue and orange trim.