Rod Blyth, a Liberal Democrat councillor representing Shaw Ward for 25 years, has resigned.
Cllr Blyth, whose photographs have already been removed from Oldham Council’s website, has also been suspended by his party.
A spokesperson for OMBC confirmed Cllr Blyth’s resignation from his long-held post.
And a statement issued by Cllr Chris Gloster, Chairman of Oldham Liberal Democrat Group on Oldham Council, on Monday, December 18 said the resignation was with immediate effect on Saturday, 9 December 2017 and it was due to “personal reasons”.
Cllr Gloster added: “There will be no by–election as it is less than six months to when this seat (3 May 2018) would be up for election.
“Until that time the other Liberal Democrat Borough Councillors for Shaw and Crompton will cover all duties such as ward surgeries and casework so local residents are not disadvantaged.”
Senior Lib Dem politicians locally refused to elaborate on Cllr Blyth’s decision to stand down after a quarter of a century service.
A spokesperson for OMBC said: “We can confirm that Oldham Council has received notification of the resignation of Cllr Blyth.
“We would not be able to comment further on any aspect of this.”
Cllr Blyth was a member of Shaw and Crompton Parish Council up until May 2015 when he retired.
He was re-elected as an OMBC councillor in 2014 with 1,106 votes, with a majority of 402 over second-placed UKIP candidate Peter Brown.