Kilgallon joins the Black Cats for an undisclosed fee and has signed a three-and-a-half-year contract with the club.
“Matthew is a very talented defender and has been coveted by a number of top flight clubs recently, so I’m very pleased to have brought him here,” Sunderland boss Steve Bruce told the club’s official website.
“He will add to our options across the back ahead of some very important games. I’m sure he will prove to be a great signing for the club.”
