Saturn Tower, Office skyscraper in Donau City, Vienna, Austria

Saturn Tower is a 90-metre office tower in the Donau City district of Vienna's 22nd municipal district, Donaustadt, built in 2003–2004 to plans by Heinz Neumann and Hans Hollein. It stands in the north-westernmost part of Donau City, next to the Mischek Tower, and rises 21 storeys. Its gross floor area is 57,200 m², of which 33,000 m² is lettable; tenants include Waagner-Biro AG.

The tower was completed in 2004 as a collaborative project between architects Hans Hollein and Heinz Neumann. Its development was part of the broader transformation of Donau City into a modern business district.

The building takes its name from the Roman god Saturn, reflecting a local tradition of naming structures after classical deities in this part of Vienna. This naming approach shows how the neighborhood's architecture maintains a connection to ancient mythology.

The Saturn Tower stands at the northwestern edge of Donau City, directly next to the Mischek Tower. It is a working office building with 21 floors and around 33,000 m² of lettable space, so interior access is arranged through the tenants rather than for general visiting.

The tower's name follows a Donau City convention of naming buildings after mythological figures, here the Roman god Saturnus. The developer was WED Wiener Entwicklungsgesellschaft für den Donauraum AG; the owner is GENO Saturn Tower/T-Center Immobilienbeteiligungsholding GmbH & Co. KG. Tenants include Waagner-Biro AG and, according to the French-language source, Volksbank AG and IBM.