The Mülheim-Heißen–Oberhausen-Osterfeld Nord railway is a line that formerly ran continuously in the western Ruhr region from Heißen (now a district of Mülheim an der Ruhr) to Osterfeld (now part of Oberhausen) in the German state of North Rhine-Westphalia. Several sections have been closed, leaving two sections, which are now used as parts of other routes. Between Essen-Borbeck and Essen-Dellwig Ost it is used by line S9 of the Rhine-Ruhr S-Bahn and the Regional-Express service RE 14, Der Borkener.