Thomas Jonas (born 9 January 1991) is a former professional Australian rules football player who played for the Port Adelaide Football Club in the Australian Football League (AFL).

Jonas made his first appearance at the senior level in the 2011 AFL season. Jonas, along with former teammate John Butcher, made his debut in round 21, against Hawthorn where Port Adelaide were defeated by 165 points. To date, it remains the worst defeat suffered by any player in his debut match in VFL/AFL history.

He was suspended for six matches in 2016 for intentionally striking West Coast's Andrew Gaff, leaving Gaff unconscious for two minutes. After his suspension expired, Jonas missed the rest of the season due to a hamstring injury. In 2018, he said that "it felt like he was suspended for half a year".

Jonas was appointed co-captain alongside teammate Ollie Wines in the 2019 season. The following year he assumed sole responsibility for the captaincy, with Wines made vice-captain.

In August 2023, Jonas announced that he would retire following the conclusion of the 2023 season.

Updated to end of the 2023 season.

Notes

Jonas is a Law graduate, having completed his study at The University of Adelaide.