Kosano Station (小佐野駅, Kosano-eki) is a railway station in the city of Kamaishi, Iwate, Japan, operated by East Japan Railway Company (JR East).

Kosano Station is served by the Kamaishi Line, and is located 86.5 kilometers from the starting point of the line at Hanamaki Station.

The station has a Midori no Madoguchi staffed ticket office.

Kosano Station opened on 15 June 1945.

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