The Academy graduate enters into a remarkable 20th season of his professional career having made his debut at Swindon Town, while on loan from United, in 2005.
Heaton continues to play an important leadership role in the squad since returning to the club in 2021.
The experienced goalkeeper has three England caps and was called into the Euro 2024 squad to support the group as a training goalkeeper.
Tom Heaton said: "I am extremely proud to continue to represent Manchester United. As a group, we are all really excited for the season ahead.
“I am ready to support the team in every capacity as we prepare to get back to challenging for the biggest honours.