Line S 5 is a S-Bahn line in the Rhine-Ruhr network. It is operated by DB Regio. It runs from via to . There are current plans to expand the line by building five new stations. It is operated between Dortmund and Witten at 30-minute intervals and between Witten and Hagen at 60-minute intervals using Alstom Coradia Continental type 1440.3 and class 422.
Line S 5 runs over the Elberfeld–Dortmund railway opened by the Bergisch-Märkische Railway Company on 20 December 1848.[1]
S-Bahn services commenced on the whole length of the route on 29 May 1994.[2]