C is a service on the S-train network in Copenhagen. It serves the Klampenborg radial and the inner part of the Frederikssund radial, and also reinforces service on the outer part of the Frederikssund radial in high-traffic period.

Charlottenlund station is a suburban rail and former main line railway station serving the suburb of Charlottenlund north of Copenhagen, Denmark, as well as the nearby Charlottenlund Beach Park and the Charlottenlund Racetrack. The station is located in the central part of the suburb where its main artery Jægersborg Allé crosses the railway line.