List of castles in Hamburg

This is a list of castles and manor houses in the German city-state of Hamburg. The list encompasses castles referred to in German as Burg, Schloss, and Herrenhaus ; existing, ruined or completely vanished.
The oldest known structures in Hamburg are or were early Medieval fortifications built between the 8th and 11th centuries, e.g. Hammaburg, Bischofsturm, Domburg, Alsterburg and Neue Burg. They were all purpose-built and are located in Hamburg's Altstadt. Remains of the Bischofsturm can be visited in close vicinity of St. Petrikirche.
Later buildings were rarely fortifications. From the 13th century onwards, Hamburg had a complete ring of defensive structures, and as one of Europe's oldest city-republics there were no royal or princely estates. In the 17th through 19th century wealthy grand burghers had their country estates built as mansions or manor houses in the former outskirts, notably along Elbe and Elbchaussee in Othmarschen, Nienstedten and Blankenese, but also along Alster and the Alster Valley.