Westfalentower, Office tower in Dortmund, Germany

The Westfalentower is an 86-metre office high-rise on the Westfalendamm (B 1) in Dortmund, with 22 storeys and a gross floor area of just under 28,000 m² on a roughly 9,000 m² site. It is the city's third-highest office building after the RWE Tower and the Telekom high-rise. A three-storey car park serves the building.

The Westfalentower's topping-out ceremony took place on 25 November 2009, with Dortmund's mayor Ullrich Sierau present. From October 2010 the production company WestCom made and broadcast the programme Sat.1 NRW from a studio in the building. By early 2012 about 90 percent of the total floor area stood empty, and owner Credit Suisse, through its Euroreal fund, had to find a buyer within five years, as announced in late May 2012.

Since October 2010 the production company WestCom has produced and broadcast the programme Sat.1 NRW from a studio in the Westfalentower. The building also houses the Weststudio of ProSiebenSat.1 AG, one of its major tenants. Visitors passing the entrances may occasionally notice broadcast vehicles and technical crews.

As this is a private office complex, most of the interior is not open to the general public without a prior arrangement. The tower is easy to spot from the surrounding streets and sits within walking distance of Dortmund city center.

The building's owner is the Euroreal fund of Credit Suisse, which had already closed; in May 2012 the bank was reported to have to find a buyer for the office block within five years. Another large tenant is ProSiebenSat.1 with its Weststudio, and Amprion GmbH moved into around 4,400 square metres in the Forum section in October 2023.