Nishi-Ōtaki Station (西大滝駅, Nishi-Ōtaki-eki) is a railway station in the city of Iiyama, Nagano Prefecture, Japan operated by East Japan Railway Company (JR East).

Nishi-Ōtaki Station is served by the Iiyama Line, and is 39.7 kilometers from the starting point of the line at Toyono Station.

The station consists of one ground-level side platform serving a single bi-directional track. The station is unattended.

Nishi-Ōtaki Station opened on 1 December 1923. With the privatization of Japanese National Railways (JNR) on 1 April 1987, the station came under the control of JR East. A new station building was completed in 1997.

• Chikuma River
• National Route 117
• Nishiotaki Dam

• List of railway stations in Japan

• JR East station information (in Japanese)