is a railway station in the city of Nagaoka, Niigata, Japan, operated by East Japan Railway Company (JR East).
Miyauchi Station is served by the Shin'etsu Main Line and the JÃ Âetsu Line. It is 162.6 kilometers from the terminus of the JÃ Âetsu Line at and is 70.0 kilometers from the terminus on the Shin'etsu Main Line at .
The station consists of one ground-level side platform and two island platforms serving five tracks. The platforms are connected by a footbridge.
The station opened on 27 December 1898. With the privatization of Japanese National Railways (JNR) on 1 April 1987, the station came under the control of JR East. The current station building was completed in 1992.
In fiscal 2017, the station was used by an average of 972 passengers daily (boarding passengers only).