He was found dead early on Wednesday morning in Bunbury, south of Perth.
Hunter played 151 games for the Eagles over a decade-long AFL career from 2000-09, before injuries led to his premature retirement.
We are devastated by the loss of 2006 Premiership Eagle Adam Hunter.— West Coast Eagles (@WestCoastEagles) Our thoughts are with his family, teammates and friends ♥️ pic.twitter.com/XMXIxKJn9bFebruary 5, 2025
Hunter kicked a career-best 29 goals in 2006, including a crucial major in the final stages of that year's epic grand final battle against Sydney.
His iconic celebration was etched in Eagles folklore as they gained revenge on the Swans for their defeat in the previous year's decider.
West Coast led tributes to Hunter on social media on Wednesday.
"We are devastated by the loss of 2006 Premiership Eagle Adam Hunter," the club posted on X, formerly known as Twitter.
"Our thoughts are with his family, teammates and friends."
Hunter's death continues a tragic week for the AFL, after former Brisbane Lions player Troy Selwood and Essendon VFL coach Dale Tapping both died on Tuesday.
Selwood's twin brother Adam was a teammate of Hunter's at West Coast.
Hunter battled legal issues after his AFL career and was fined $400 for possessing cocaine when stopped by West Australian police in 2014.