The Dolderbahn (Db or DBZ) is a 1.3 km (0.81 mi) long rack railway in the Swiss city of Zürich.

The line is in Zürich's Hottingen and Fluntern suburbs on the south slope of the Adlisberg mountain.

The upper terminus of the funicular was roughly on the site of the uppermost of the current line's two intermediate stations.

The line was built to the same 1,000 mm (3 ft 3+3⁄8 in) gauge as Zürich's other electric tramways, but was never connected to any of them.

The cars were electrically driven off a 600 volt direct current overhead supply and were propelled by a cog-wheel attached to the downhill axle of each vehicle.

[2][7] They were built by the Swiss Locomotive and Machine Works, with electrical equipment from Brown, Boveri & Cie, in 1972.

[10] In June 2021, the Verkehrsbetriebe Zürich ordered two new railcars from Stadler Rail at Bussnang to replace the existing pair of cars used on the line.

The passing loop is situated between Titlisstrasse and Waldhaus Dolder stations and features flexible rack turnouts at both ends.