Kamisakai Station (上境駅, Kamisakai-eki) is a railway station in the city of Iiyama, Nagano Prefecture, Japan operated by East Japan Railway Company (JR East). In older station photos, its name is hyphenated "Kami-Sakai".

Kamisakai Station is served by the Iiyama Line, and is 31.3 kilometers from the starting point of the line at Toyono Station.

The station consists of one side platform serving one bi-directional track. The station is unattended.

Kamisakai Station opened on 6 July 1923 as Nozawa Onsen Station (野沢温泉駅). It was renamed to its present name with the nationalisation of the Iiyama line on 1 June 1944. 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 December 2006.

• Chikuma River
• National Route 117

• List of railway stations in Japan

• JR East station information (in Japanese)