The Albula Railway is a single track metre gauge railway line forming part of the so-called core network of the Rhaetian Railway, in the Canton of Graubünden, Switzerland. It links Thusis on the Hinterrhein at 697 m and Filisur at 1,080 m with the spa resort of St. Moritz in Engadine at 1,774 m.
Construction of the Albula Railway was begun in September 1898, the opening took place on 1 July 1903, and the extension to St. Moritz commenced operations on 10 July 1904. With its 55 bridges and 39 tunnels, the 61.67-kilometre long line is one of the most spectacular narrow gauge railways in the world.
On 7 July 2008, the Albula Railway and the Bernina Railway, which also forms part of the RhB, were jointly recorded in the list of UNESCO World Heritage Sites, under the name Rhaetian Railway in the Albula / Bernina Landscapes.
The best known trains operating on the Albula Railway are the Glacier Express and the Bernina Express.