It is operated by moBiel, a subsidiary of the Bielefeld municipal authority (Stadtwerke), and integrated in the Westfalentarif transport association.

Trains run until 1 a.m. every day, with service starting at 4:30 a.m. every weekday, at 6:00 a.m. on Saturdays, and at 8:30 a.m. on Sundays and public holidays.

The Bielefeld Stadtbahn is made up of four lines, with a total track length of 66.3 kilometres (41.2 mi).

[1][2] The mainline network operates over a total route length of 36.9 kilometres (22.9 mi),[1][2] serving 62 stops,[1][2] of which seven are underground stations.

[3] In 2013 the municipal council decided to build a new Line "5" from the Kunsthalle Bielefeld via Jahnplatz and Kesselbrink to Heepen, with an opening planned for 2019.