Sender Hamburg-Rahlstedt, Radio and TV transmission tower in Rahlstedt, Hamburg, Germany.

Sender Hamburg-Rahlstedt is a radio and television transmission tower in Hamburg's northern Rahlstedt district that broadcasts signals across the surrounding region. The facility uses specialized equipment to transmit multiple radio and television programs at the same time to homes and businesses.

The first mast, a 163-metre guyed steel lattice tower, was built in 1994. In 2009 work began on a 250-metre replacement nearby, intended to improve DVB-T television coverage; it is Hamburg's third-tallest structure. The old mast was dismantled in March 2010. Alster-Radio broadcast from the site until spring 2018, when Rock Antenne Hamburg took over its frequency.

Alster-Radio was the only analogue radio station broadcast from the mast; it complained of antenna costs of about €183,000 a year up to 2016, rising to €387,000 from April 2017. At the end of 2017 Rock Antenne GmbH & Co. KG took 49 percent of Alsterradio, and in spring 2018 Alster-Radio ceased and Rock Antenne Hamburg went on air on the same frequency.

The 250-metre mast stands in the Höltigbaum area of Rahlstedt, in Hamburg's Wandsbek borough, surrounded by but not part of the Höltigbaum nature reserve. It is a guyed steel lattice mast, so the site is fenced and not open to visitors; there is no viewing platform. Reception is aimed at households, not tourists.

The 250-metre mast, completed around 2010, is Hamburg's third-tallest structure. Conservation groups opposed it, expecting the guy wires to kill many birds each day, since the site is surrounded by but not inside the Höltigbaum nature reserve; after construction no notable number of dead birds was found.