Mechanicsburg, Henry County, Indiana  Mechanicsburg is an unincorporated community in Fall Creek Township, Henry County, Indiana. Mechanicsburg was laid out and platted in 1858. A relatively high number of settlers employed as mechanics caused the name to be selected. The post office in Mechanicsburg was discontinued in 1907. Mechanicsburg is located at at the intersection of US 36 and Mechanicsburg Road.