Since becoming captain in 2019, Jonas has led the side in 94 of his 215 games for the club over his career.
Unfortunately, Jonas hasn't quite been able to take his side to a grand final yet but has lifted the side to be one of the stronger contenders for the flag each season, even making the preliminary final twice as captain and looking at a possible third time this season.
So without him, who takes the reins as captain from 2024?
We've named five potential players that Port Adelaide are likely to consider.
1. Connor Rozee
Rozee has been a standout for the Power this season and seems likely to take the role as their next number one man. His ability to get his teammates involved with precision kicks means that under his leadership, team performance would lift significantly.
Rozee was an All-Australian last season, named in the 22under22 twice (2019, 2022) and won Port Adelaide's best and fairest last year amongst other accolades.
Statistically, he has also had a really strong season. His numbers are incredible with 25.7 disposals, 4.9 tackles, and 19 goals this season with a strong ability to be dangerous coming from the middle.
With his efforts around the ball, the proud South Australian could easily be the top candidate for the captaincy role at Port Adelaide.