Mill Office and Post Office is a registered historic building in Woodsdale, Butler County, Ohio.

It was used as department store and a US Post office from 1850 to 1874.

It was listed in the National Register on November 1, 1984.

The area is an Augspurger Amish and Mennonite settlement.

This article about a property in Butler County, Ohio on the National Register of Historic Places is a stub.