Vogtturm, Fortified tower and city museum in Zell am See, Austria

Vogtturm is a five-storey fortified tower at the corner of Stadtplatz and Dreifaltigkeitsgasse in Zell am See. Its walls are 8.6 metres wide on the north, south and west sides and 13.5 metres on the east, giving a trapezoidal plan. The tower is 23.5 metres high, and four of its floors are used for the town museum.

The tower dates from the High Middle Ages, when it was built as a fortified keep controlling travellers and collecting road tolls for the counts of Lechsgemünd-Frontenhausen, who held Pinzgau as a fief. A fire in 1770 destroyed two storeys and the roof; charred timber in the attic still shows the damage. From 1798 the Kastner family owned it for 145 years.

The name Vogtturm was coined in 1834 by Ernst Ritter von Koch-Sternfeld; older names such as Kastnerturm came from owner families, and no source confirms a medieval 'Vogt' origin. The museum shows local customs, economic and tourism history, and paintings of Lake Zell by Richard Hirschbäck (1937–2007).

The tower stands at the corner of Stadtplatz, Dreifaltigkeitsgasse and Turmplatzl, in the pedestrian core of Zell am See. Four of its five floors hold the museum, reached by stairs; the entrance is at street level. The tower reopened in July 2020 under a new museum and safety concept.

The tower's name is not documented in old records: Ernst Ritter von Koch-Sternfeld first called it "Vogtthurm" in an 1834 essay on the Counts of Hundt. Older names came from owner families, such as Kastnerturm after Johann Kastner, who bought the tower in 1798.