Ryōishi Station (両石駅, Ryōishi-eki) is a Sanriku Railway Company station located in Kamaishi, Iwate Prefecture, Japan.

Ryōishi Station was served by the Rias Line, and was located 42.7 rail kilometers from the terminus of the line at Sakari Station.

Ryōishi Station had a single side platform serving traffic in both directions.

The station was absorbed into the JR East network upon the privatization of the Japan National Railways (JNR) on 1 April 1987.

As of 2018, the station have been rebuilt along with the rest of the closed segment of the Yamada Line.