Mill Rock is an

unincorporated community An unincorporated area is a region that is not governed by a local municipal corporation. Widespread unincorporated communities and areas are a distinguishing feature of the United States and Canada. Most other countries of the world either have ...

in Columbiana County, in the U.S. state of

Ohio Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The sta ...

History

A stone

watermill A watermill or water mill is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding), rolling, or hammering. Such processes are needed in the production of ...

was built at the site of Mill Rock in 1808. A post office called Mill Rock was established in 1876, the name was changed to Millrock in 1895, and the post office closed in 1904.

References

Unincorporated communities in Columbiana County, Ohio 1808 establishments in Ohio Unincorporated communities in Ohio {{ColumbianaCountyOH-geo-stub