Smithville is a village in Wayne County, Ohio, United States.

There were 573 housing units at an average density of 462.1 per square mile (178.4/km2).

28.1% of all households were made up of individuals, and 9.6% had someone living alone who was 65 years of age or older.

26.8% of all households were made up of individuals, and 11.6% had someone living alone who was 65 years of age or older.

Smithville is home to the Wayne County Schools Career Center.

It is also home to the campus of the Green Local School District, which also includes nearby Marshallville.