Sender Westerland, Radio and television tower in Westerland, Germany.

Sender Westerland is a transmission mast in the centre of Westerland on Sylt, Germany's northernmost broadcasting site, in operation since 1976. The site carries five FM transmitters alongside police, taxi and fire-service radio, and it also broadcasts the television channels Das Erste, ZDF and NDR, distributed digitally via DVB-T multiplexes since 2006. Its signal reaches the North Frisian islands, the mainland and parts of the Danish coast.

The current mast replaced a lower red-and-white tubular mast that stood on the northeast side of the former post office on Stephanstrasse and served only radio and TV reception on Sylt. After the new facility opened in 1976 and the Bundespost department moved, the old mast was demolished. The NDR, meanwhile, built its own transmitter at Morsum, about 10 km away.

The site carries five FM stations alongside police, taxi and fire-service radio, and it feeds North Sea coastal shipping with weather reports and radar data. Its DAB signal shares channel 5C with other German transmitters, while the NDR multiplex reaches Sylt from Morsum, about 10 km away.

The site stands in the town centre of Westerland, so it can be passed on foot while walking through the pedestrian area. The grounds and buildings are not open to visitors; the mast is seen from the street. Reception reaches Rømø, Amrum and Föhr, and the signal carries weather reports and radar data for North Sea coastal shipping.

The old mast it replaced was a red-and-white tubular mast beside the former post office on Stephanstraße, used only for radio and TV reception on Sylt and demolished after the 1976 move. The site's reach is put at about 70,000 people.