In terms of candidate requirements for municipal offices, municipalities are broken into two categories:
Full requirements for municipal offices including: mayors, municipal court judges, municipal court clerks, township office, and board of education members can be found in the 2019 Ohio Candidate Requirement Guide published by the Secretary of State.
Election rules may vary by municipality as well, so it is important to check the constitutional and statutory provisions of the municipality in which the candidate desires to run for office. Most municipal codes are available free online through third party services. To find the code for your desired municipality, either go to the municipalitie's webpage or by searching for the code on Google.