The new deal will keep the youngster at St James’ Park until the summer of 2016.
“I’m really happy,” Ferguson told the club’s official website.
“I’ve enjoyed this season so much and the new contract has just been the icing on the cake for me.
“It’s a great thrill to play for the club and the support I have had from the fans since making my debut really means a lot so I’m just delighted to be with Newcastle for the next five years now.”
