Maineville is a village in Warren County, Ohio, United States.

A village flag was designed and created by John Michael, later to become Mayor of Maineville.

The flag includes Ohio and Maine, the state seals and a connecting reference to the two areas.

[6] According to the United States Census Bureau, the village has a total area of 1.37 square miles (3.55 km2), all land.

30.7% of all households were made up of individuals, and 13.5% had someone living alone who was 65 years of age or older.

[citation needed] As of the census[3] of 2000, there were 359 people, 164 households, and 158 families living in the village.

26.1% of all households were made up of individuals, and 17.3% had someone living alone who was 65 years of age or older.