Opposition councillors in Sheffield are calling for the city council to retain its 84 councillors after a shake-up of boundaries.
Liberal Democrats say they would be concerned if the present structure of three councillors per ward is shrunk.
The party says the number is needed because councillors have different areas of expertise, and to ensure someone is available to help the public if a colleague is unavailable through illness or holiday.
Coun Shaffaq Mohammed, Lib Dem group leader, added: “Having three councillors also allows a spread of ward work.
“We hope the review will give careful consideration to ensuring savings are made without damaging the important democratic function of the council.”
The review was called due to population changes.