Heeney was among a bevy of Swans players eligible to enter free agency in 2022, with the 25-year-old opting to turn his back on options elsewhere in favour of staying in the Harbour City.
The Swans Academy graduate has been a mainstay in John Longmire's side since making his debut in 2015, featuring as a key piece in their attacking third across 129 games in the red and white.
The jet midfield-forward utility will now be a 'Blood for life', with Heeney expressing his delight in re-signing for the long haul.
“I’m over the moon, this is a club that is very special to me. It’s the club I grew up barracking for and to be a one club player here at the Sydney Swans is incredibly humbling and extremely exciting,” Heeney said.
“The bond we have at this club, from the players to the coaching staff, we’re all one unit. We ride the highs and lows together, and how we stick together is a reflection of the Bloods culture.
“I’m determined to help this club achieve that ultimate success. Losing the 2016 Grand Final makes you appreciate how hard it is to get there on the last day of September, and how much I really want it. Over the next six years that is my biggest goal.”
The Swans gun will play a pivotal role in Sydney's ambitions to improve on their stellar 2021 campaign, where they amassed a top-eight finish against the odds.
With the Swans looking to take further steps in their push for their first flag in a decade, Heeney will be one of several prominent figures in the club's premiership plaudits this year.
“Isaac is a special player whose hard work and dedication has seen him develop into one of the best talent’s our Club has seen,” Swans football boss Charlie Gardiner said.
“He is an enormous competitor, driven to improve year on year and we’re confident his best is still to come. Isaac’s long term commitment to the Club is testament to his love and passion for the Club, his coaches and his teammates. I know his focus is squarely on helping the team get better and delivering ultimate success.
“The Swans community, including players, staff and our members, can look forward to watching Isaac in the red and white for many years to come.”
The Swans will begin their 2022 campaign against Greater Western Sydney at Accor Stadium on Saturday, March 19, beginning Heeney's ninth season with Sydney.