Shimotsuke-Ōsawa Station (下野大沢駅, Shimotsuke-Ōsawa-eki) is a railway station in the city of Nikkō, Tochigi, Japan, operated by the East Japan Railway Company (JR East).

Shimotsuke-Ōsawa Station is served by the Nikkō Line, and is located 28.2 kilometers from the terminus of the line at Utsunomiya.

Shimotsuke-Ōsawa Station opened on 1 November 1929.

On 1 April 1987 the station came under the control of JR East with the privatization of the Japan National Railways (JNR).

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