Harshaville, Ohio (also known as Harshasville[1]) is an unincorporated community in Adams County, Ohio, USA, in the southern part of the state.

Harshaville was built up around the early Harsha Mill, a gristmill powered by the Cherry Fork Creek.

[2] The community was named for the local Harsha family.

[3] A post office was established at Harshaville in 1865, and remained in operation until 1909.

This Adams County, Ohio state location article is a stub.