Princeton residents will vote for their new mayor on Aug. 11, replacing former mayor Fred Thomas who died in early May from cancer.
An advanced poll will take place on Aug. 1 for those who cannot make it on the regular day.
No one has confirmed to the Spotlight they are running for mayor, and candidates have from June 26 to July 8 to announce they are running.
Thomas beat incumbent Randy McLean by just over 200 votes in the November election. Around 45 percent of Princeton residents cast their ballots.
Shirley MaMahon, who is also deputy treasurer, was appointed chief election officer for the by-election.
If a member of town council chooses to run for mayor, he or she must resign from council by June 18.