Blyth councillor Jeff Reid failed in his latest bid to become an MP.
The Plessey Ward member, a former leader at Northumberland County Council, came fourth of five in the Hexham constituency.
The Liberal Democrat candidate polled 2,961 votes, just over 500 ahead of Lee Williscroft-Ferris for the Green Party.
Mr Reid said: “Unfortunately we fell foul of the national drop in the Liberal Democrat vote.
“Although we’ve done slightly better in Northumberland than the overall swing away from us across the UK, I’m disappointed with the outcome.
“We were unable to persuade people that we could offer a good alternative to the Tories and I’m concerned that they will continue to disregard local government like they’ve done over the last five years.
“In politics, you have to take the rough with the smooth and both I and the other Lib Dem councillors in Northumberland will pick ourselves up and carry on fighting for the people we represent and the county as a whole.”
He had previously finished second behind Labour’s Ronnie Campbell in Blyth Valley at the 2001, 2005 and 2010 General Elections.
Conservative MP Guy Opperman held the Hexham seat he first won in 2010.
Mr Opperman secured the seat with 22,834 votes, ahead of Labour’s Liam Carr with 10,803 and David Nicholson of UKIP in third place with 4,302 votes.
In 2010 Mr Opperman was elected with 18,795 votes, marking a 43.2 per cent share, ahead of the Liberal Democrats and Labour.
Turnout was 71.5 per cent.
The result comes after the Conservatives took a slim national majority.
Guy Opperman (Cons) – 22,834
Liam Carr (Lab) – 10,803
David Nicholson (UKIP) – 4,302
Jeff Reid (Lib Dem) – 2,961
Lee Williscroft-Ferris (Green) – 2,445