The Ohio Secretary of State maintains rosters of Ohio counties, cities, townships, and villages.

Ohio is divided into 88 counties. County governments are led by commissioners and provide general government and services. The state is also divided into townships, which provide government and services for areas not within a municipality. Each county may have several townships.

Municipalities are the most localized division of government. A municipality of less than 5,000 residents is a village while municipalities with 5,000 residents or more are cities. Cities and villages may span county and township lines.

Ohio is a home rule state. Cities, and villages may pass laws to govern themselves. Local laws must align with the state and federal constitutions. Cuyahoga and Summit Counties have home rule charters that allow them to pass laws. Home rule also applies to townships with more than 2,500 residents.