The Erfurt Stadtbahn is a light rail network that is the basic public transit system of Erfurt, the capital of  Thuringia in Germany.

It represents the evolution of the city's original tramway which, outside the city centre, travels on track on its own right-of-way. The metre gauge network is made up of six lines and has a total route length of 45.2 kilometers (28.1 miles) making it one of Germany's more moderate-sized networks. The network is run by Stadtwerken Erfurter Verkehrsbetriebe AG (SWE EVAG). The Stadtbahn carried 41.933 million passengers in 2012, which corresponds to about 114,885 passengers per day.