"Princess of the Night" is a single by British heavy metal band Saxon, featured as the opening track and single from their 1981 album Denim and Leather; the song was written as a group production of all five members of the band at the time: Peter "Biff" Byford, Steve Dawson, Pete Gill, Graham Oliver, and Paul Quinn. The lyrics of the song deal with narrator's affinity of a steam locomotive of the LMS Princess Royal Class.

The single itself peaked in its popularity at 57 on the UK Singles Chart.