Mings joined Bournemouth from Ipswich Town in the summer of 2015, but only made one Premier League appearance during the 2015-16 campaign after suffering a serious knee injury on his debut.
The 24-year-old has since established himself in Eddie Howe’s first team, however, and the former Southampton youngster has now been handed a new long-term contract at the Vitality Stadium.
“It was an easy decision for me because I’m very settled down here,” Mings told Bournemouth’s official website. “The first two years of my time wasn’t an easy one, with trying to get in the team and getting injured on my debut.
“But I came out of it the other end, had a bit of a run in the team last year and feel like I am in a good place now. I’m over the moon to be staying.”
The length of the contract has not been disclosed by Bournemouth.