is a railway station in Nan'yà Â, Yamagata, Japan, operated by the Yamagata Railway.
Miyauchi Station is a station on the Flower Nagai Line and is located 3.0 rail kilometers from the terminus of the line at Akayu Station.
Miyauchi Station has a single Island platform.
Miyauchi Station opened on 26 October 1913 as . The station was absorbed into the JR East network upon the privatization of JNR on 1 April 1987.
It became a station on the Yamagata Railway from 25 October 1988, and was renamed to its present name on the same day.