Windeckbunker, Architectural heritage monument in Bonn-Zentrum, Germany.

The Windeckbunker is a 21.5-metre, six-storey high-rise bunker on Budapester Strasse in central Bonn, next to the Altes Stadthaus. Its reinforced-concrete walls are 1.10 metres thick on the upper floors, up to 3 metres in the cellar, with a 1.80-metre floor slab and a 1.40-metre ceiling.

Built in 1941 during World War II, this structure served as an air-raid shelter for about 800 people and functioned as the city's command center. It played a central role in Bonn's operations throughout the conflict.

The bunker's name comes from Windeckstraße, the street it faces, renamed Budapester Straße in 1997; the street honoured mayor Johann Martin Joseph Windeck. The building housed the city's air-raid control centre and the mayor's command post, and in 1943 a rooftop warning station with six times three beds was added by the firm WAKO, no longer standing.

The building is located on Budapester Straße and is not accessible to the public. It is managed by the federal government and the city of Bonn, and visits are only possible with special permission.

In 1943 a warning centre with a day room and a dormitory holding 6 × 3 beds was added to the roof by the WAKO firm; it no longer exists. The bunker's name comes from Windeckstraße, named after former Bonn mayor Johann Martin Joseph Windeck.