Fernmeldeturm Rostock, Telecommunications tower in Stadtweide district, Rostock, Germany.

Fernmeldeturm Rostock is a 140-meter concrete structure located in the Stadtweide district that now serves exclusively for mobile telecommunications. The tower features a central shaft designed to support and distribute transmission signals across the region.

Construction of the Richtfunkturm Rostock-Stadtweide began in spring 1968, and by autumn of that year the antenna carrier was being mounted above 100 metres. It was the most important transmitter site in Rostock and one of the oldest reinforced-concrete transmission towers in the former GDR. In the 1990s it was fully renovated during the transfer from Deutsche Post to Deutsche Telekom, and on the night of 4–5 August 2014 its radio and TV broadcasts moved to Rostock-Toitenwinkel.

The tower's name comes from its role as a Richtfunkturm, a directional radio relay built for the Deutsche Post. Its civilian broadcasts included programmes made in the Ostsee-Studio Rostock, such as Visite and Musik und Snacks vorm Hafen. A less-known use was its place in the Deutsche Volkspolizei's nationwide VHF relay network, which could link a Rostock patrol car to a police office in Dresden.

The structure is visible from various points around the Stadtweide area and currently operates for mobile network coverage only. The interior is not accessible to visitors, as it functions as active telecommunications infrastructure.

A second, smaller transmission tower stands a few hundred metres away on Am Tannenweg, at 54°4'28" N 12°4'52" E. It is unrelated to the former medium-wave transmitter that once stood southwest of the main tower, and it still serves mobile operators today.