Steele has taken his game to another level in 2020, currently leading the Saints in disposals, contested possessions, clearances, tackles and score involvements.
He has averaged 22.2 disposals, 5.2 tackles and 4.8 clearances per game this season.
Head of List Management James Gallagher said he is thrilled the club has been able to re-sign Steele.
“We’re rapt that Jack has recommitted to the Saints,” Gallagher told the club website.
“After finishing in the top 3 in both the 2018 and 2019 Trevor Barker Awards, Jack has elevated his game in 2020 to a very high level, which is just reward for the hard work, competitiveness and determination that we at the football club see from Jack on a daily basis.
“As pleasing as Jack’s performances in 2020 have been, his leadership and positive influence on his teammates have been equally as impressive. He’s an incredibly competitive footballer, and also a very popular, humble and well-respected player off the field.
“He has all the character attributes that we value at St Kilda, so we anticipate a great future for Jack, alongside the emerging group of younger players that have become the core of our senior team this year.
Coming to a screen near you. pic.twitter.com/nBp8wQy4XS
— St Kilda FC (@stkildafc) September 3, 2020