Dummett has agreed a new long-term contract, which could keep him at his boyhood club for the next six years.
Speaking of his new contract, Dummett said: "I am delighted to secure my long-term future with Newcastle United.
"Like so many local lads, it has been my boyhood dream to play for this club and now I am looking forward to repaying their faith in me and working hard to be the best possible player I can be."
Director of football Joe Kinnear added: "We're delighted that Paul has committed his long term future to the club.
"In reality, this was never in doubt as we wanted Paul to stay and, as a Geordie, Paul made it clear that the only place he wanted to play was Newcastle United - it was just a question of finding the right deal for both parties, which we have managed to do."
For the big stories and the banter follow us on Twitter: @tribalfootball