Wallisellen–Uster–Rapperswil railway line

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 line runs from Wallisellen, where it diverges from the Zürich–Winterthur line to Uster and Rapperswil. A second link from Zürich, via the Zürichberg Tunnel, joins the line just before Dübendorf, and both routes are used by through trains from Zürich. The line also has junctions with the Effretikon to Hinwil line, at Wetzikon, and the Tösstalbahn, at Rüti. At Rapperswil, it connects with the Lake Zurich right bank line, the Rapperswil to Ziegelbrücke line, and the Südostbahn over the Seedamm.

The name Glattalbahn is German for Glattal railway, or Glatt valley railway. The river Glatt is a tributary of the river Rhine flowing from Greifensee lake to Glattfelden in Switzerland.