Tremont City is a village in Clark County, Ohio, United States.

The village is part of the Springfield, Ohio Metropolitan Statistical Area.

Tremont City was originally known at Treemount because the settlement was situated at the base of a hill covered with large trees.

[5] According to the United States Census Bureau, the village has a total area of 0.26 square miles (0.67 km2), all of it land.

[6] As of the census[8] of 2010, there were 375 people, 151 households, and 99 families living in the village.

28.5% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older.

24.6% of all households were made up of individuals, and 3.0% had someone living alone who was 65 years of age or older.