| Shimotsuke-Ōsawa Station | |
| Style: | JR East |
| Native Name: | 下野大沢駅 |
| Native Name Lang: | ja |
| Address: | 557 Dosawa, Nikkō-shi, Tochigi-ken 321-1274 |
| Country: | Japan |
| Operator: | JR East |
| Line: | Nikkō Line |
| Distance: | 28.2 km from |
| Platforms: | 2 side platforms |
| Tracks: | 2 |
| Status: | Unstaffed |
| Opened: | 1 November 1929 |
| Passengers: | 731 |
| Pass Year: | FY2014 |
| Map Type: | Japan Tochigi Prefecture#Japan |
| Map Dot Label: | Shimotsuke-Ōsawa Station |
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 .
The station consists of two opposed side platform, connected to the station building by a footbridge. The station is unattended.
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). A new station building was completed in 2010.