A by-election could be held following the resignation of Labour councillor Pat Cartledge from Cherwell District Council.
Mr Cartledge, who has served three spells as a district councillor, represents the Ruscote ward.
Sean Woodcock, Cherwell district councillor and leader of the Banbury Labour group, said: “Pat was a great influence on me joining the party and getting involved.
“He was my first point of contact and was very welcoming.
“He has an outstanding personality and is a warm character, which is why so many people get on with him. He is a lovely man and I wish him all the best in his new career. If there is anyone that deserves success in his new venture, it is him.
“He deserves a lot of credit for the things he has done for the local residents in Banbury.”
The district council has received requests to call an election from two electors, in keeping with election law.
The Banbury Labour Party has already chosen Mark Cherry, who lives in Ruscote, as the candidate to replace Mr Cartledge. If Mr Cherry is contested, a by-election will be held on September 26.
Mr Cartledge said: “I regret that I must resign as a councillor because my job has been transferred to a different part of the country. However, I know that Mark Cherry has all the qualities to make an excellent representative of the people living in Ruscote.”
Mr Cartledge has also resigned his seat on Banbury Town Council.