Signalman is a person who historically gave signals using flags and light.
Signalman may also refer to:
Signalman (rank), the military rank Signalman (rail), a railwayman who operates the points and signals in a railway signal box The Signal-Man, an 1866 short story by Charles Dickens The Signalman (film), a 1976 BBC television adaptation Signalman (comics), a villain in the Batman comics A ranger-like ally in Gekisou Sentai Carranger