Central Coast's A-League season commenced on 15 August 2008. After losing in the Grand Final in the previous season, they again made the finals series after finishing fourth, only to be eliminated by Queensland Roar.

The Mariners also competed in the Pre-Season Cup, where they were eliminated in the group stage.

In Asia, the Mariners lost in the Champions League group stage, drawing two games and losing four.

Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

Source:

Supplier: Reebok

Source: the-AFC.com
Rules for classification: 1) points; 2) goal difference; 3) number of goals scored.
¹First place through to sixth place qualify for the 2009 A-League Finals Series.
²First place qualifies for the 2010 AFC Champions League Group stage.
³Winning the 2009 A-League Grand Final automatically earns qualification for the 2010 AFC Champions League Group stage, unless first place are champions.
⁴Second place qualifies for the 2010 AFC Champions League Qualifying play-off, unless they qualify for the 2010 A-League Grand Final alongside first place or become A-League Champions, subsequently third place then qualify for the 2010 AFC Champions League Qualifying play-off.

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