The Bonn Stadtbahn (German: Stadtbahn Bonn) is a Stadtbahn system in Bonn and the surrounding Rhein-Sieg area, that also includes the Bonn Straßenbahn. Although with six actual Stadtbahn lines[1] (as well as three tram lines) the network is relatively small, two of Bonn's Stadtbahn lines connect to the much larger Cologne Stadtbahn (and are numbered according to that system, not Bonn's).
The Stadtbahn network comprises 95.84 kilometres (59.55 mi) of route.[1] There are 64 stations and stops in the city of Bonn proper,[1] and another 17 in the Rhein-Sieg-Kreis.[1] Additionally, 8.72 kilometres (5.42 mi) of the Stadtbahn is located underground,[1] as are 12 of the Stadtbahn stations.