Mizunuma Station (水沼駅, Mizunuma-eki) is a railway station in the city of Kiryū, Gunma, Japan, operated by the third sector railway company Watarase Keikoku Railway.

Mizunuma Station is a station on the Watarase Keikoku Line and is 16.9 kilometers from the terminus of the line at Kiryū.

The station has a two opposed side platforms connected by a level crossing.

Mizunuma Station opened on 5 September 1912 as Mizunuma Teishajo (水沼停車場) on the Ashio Railway.

It was renamed to its present name on 1 June 1918.