The Wallisellen–Uster–Rapperswil railway line is a railway line in the canton of Zürich in Switzerland. It is also known as the Glatthalbahn, Glatttalbahn or Glattalbahn (Gl-TB), although the latter name is now more commonly used to refer to the Stadtbahn Glattal, a nearby light rail system.

The Glattalbahn, originally known as the Stadtbahn Glattal, was a project that was ultimately successful in introducing a modern rapid-transit system to the Glattal area of Switzerland, to the north of the city of Zürich. Stadtbahn Glattal was developed as a metre gauge tram system with through-running to neighbouring Zürich. It was built and is owned by the Verkehrsbetriebe Glattal (VBG), but is operated under contract to them by the Verkehrsbetriebe Zürich (VBZ).