Iwate-Kawaguchi Station (岩手川口駅, Iwate-Kawaguchi-eki) is a railway station on the Iwate Ginga Railway Line in the town of Iwate, Iwate Prefecture, Japan, operated by the Iwate Ginga Railway.

Iwate-Kawaguchi Station is served by the Iwate Ginga Railway Line, and is located 26.9 kilometers from the terminus of the line at Morioka Station and 562.2 kilometers from Tokyo Station.

Iwate-Kawaguchi Station has an island platform and a single side platform connected to the station building by a footbridge.

The station was absorbed into the JR East network upon the privatization of the Japanese National Railways (JNR) on 1 April 1987 and was transferred to the Iwate Ginga Railway on 1 September 2002.

In fiscal 2015, the station was used by an average of 296 passengers daily.