The 28-year-old has become a valuable asset for the Hawks since making the move from the Demons, playing 12 games for the club this season, averaging 13.3 disposals and 4.6 marks per game.
Hawthorn National List and Recruiting Manager Mark McKenzie said that the club was an important part of the club, both as a player and a leader.
“Frosty has proven a reliable and important player for us since coming across at the end of 2019,” McKenzie said.
“Despite only being in his third year at the club, Sam has quickly developed into a valuable leader for our young and emerging group.
“Along with being among our most fierce competitors on the field, Sam continues to help foster Hawthorn’s strong culture, as well as drive standards to set us up for future success.”
Speaking to The Age after his new deal was announced, Frost said that extending his time at the club was "straightforward" and he was looking forward to the future.
“I feel like I fit in well with the club and our values align. I feel really valued by the club … I quite enjoy the environment and the people,” Frost said.
“There was no reason for it to be other than straightforward. The club respected the work I have done in the last couple of years and I wanted to be at the club.
“We are trying to look at the whole journey in its entirety. We are not looking to get to the end of the year. We are looking to keep building through the end of the year, then, obviously have a break, and take that momentum into the pre-season and into next year. That’s our mentality. We really want to attack next year."