Butler Mayor Maggie Stock will run for re-election this year.
She and city Controller Gretchen Ehlman are the only city officials who have said they plan to run.
The terms of Councilwoman Kathy Kline and Councilman Rick Schontz Jr. also end this year, but neither has said for sure that they will seek re-election.
Schontz said, “I have not made up my mind totally, but I am leaning toward running again.”
Kline, too, is on the fence regarding running for re-election.
“I have been thinking about it, but I'm not sure,” she said.
Stock, Kline and Ehlman first took office in 2006, while Schontz began serving on council in 2010 after a successful write-in campaign.
The primary will be May 21, and the last day to register to vote in the primary is April 22.
The general election is Nov. 5.