is a passenger railway station operated by the Takamatsu-Kotohira Electric Railroad in the city of Sanuki, Kagawa, Japan. It is operated by the private transportation company Takamatsu-Kotohira Electric Railroad (Kotoden) and is designated station "N17".
Nagao Station is a terminus of the Kotoden Nagao Line and is located 14.6 km from the opposing terminus of the line at Kawaramachi Station and 16.3 kilometers from Takamatsu-Chikkà  Station.
The station consists of a single side platform serving one track. An additional storage track is situated on the north side. The station is staffed.
Nagao Station opened on 30 April 1912.