Alex Cunningham has been re-elected as the MP for Stockton North, with a significantly decreased majority.
The Labour candidate beat Conservative Steven Jackson by 1,027 votes, slashing his majority at the 2017 election by 7,688 votes.
Speaking to the BBC, Mr Cunningham said his victory was “bitter sweet” given the exit polls were projecting a Conservative majority nationally.
He called for Labour leader Jeremy Corbyn to resign, the BBC's Mark Denten reported.
Martin Walker of the Brexit Party came third and Liberal Democrat Aidan King came fourth.
Voter turnout was down by 2.7 percentage points since the last general election.
More than 41,000 people, 61.7% of those eligible to vote, went to polling stations across the area on Thursday, in the first December general election since 1923.
Two of the five candidates, Mr King and Mark Burdon (North East Party) lost their £500 deposits after failing to win 5% of the vote.
This story was created using some automation.