Wiener Tramwaymuseum, Transport museum in Landstraße, Austria.

The Wiener Tramwaymuseum is a collection founded in 1966 by Helmut Portele, now housed in an adapted former Semperit hall in Traiskirchen, Lower Austria. It holds over 100 historic vehicles, about 30 of them operational, covering Vienna's tram, Stadtbahn and trolleybus history, plus an archive of 4,552 items and 28,520 spare parts.

Helmut Portele founded the collection in 1966; from 1969 to 1972 it was a working group of the Verband der Eisenbahnfreunde, and since 1973 it has been an independent association. From 25 November 1972 to 16 February 1986 the collection was regularly open to the public in the Ottakring depot. After the Erdberg site returned to Wiener Linien in 2012, Portele moved the collection to a former Semperit hall in Traiskirchen, adapted as the WTM museum depot.

The collection preserves vehicles from every era of Vienna's tram, Stadtbahn and trolleybus history, including the last surviving Vienna trolleybus motorcar with its trailer. Special trips run through Vienna with historic cars, and the entire collection is protected as a single monument.

The collection is kept in an adapted former Semperit hall in Traiskirchen, Lower Austria, not in central Vienna, so plan the trip outside the city. Visits run as guided tours; check current tour times before travelling. The depot holds over 100 vehicles, so allow time to walk through the hall.

The museum preserves some of Europe's earliest streetcar vehicles, including horse-drawn models from the 1860s that operated on Vienna's first routes. These rare examples demonstrate how basic the original systems were before electric power transformed public transit.