Vorstadtschleuse Brandenburg, Navigation lock in Brandenburg an der Havel, Germany.

Vorstadtschleuse Brandenburg is a lock on the Lower Havel Waterway with two separate chambers that allow vessels to move between different water levels. The southern chamber extends about 220 meters in length and measures around 17.5 meters in width.

The lock was built between 1881 and 1883 in the Krakauer district to manage the growing ship traffic of the industrial age. This structure responded to rising demands from commerce during industrialization.

The lock's earlier name, Vorstadtschleuse, refers to the Vorstadt suburb outside the old town; today the structure is a pure recreational-boat lock, while commercial shipping is routed through the Krakauer Vorstadt lock. Until modern communication arrived, a Schiffahrt-Abgaben-Hebestelle at the lock collected waterway tolls from skippers on behalf of owners, sometimes in cash.

The lock is a pure recreational-boat lock; commercial shipping is routed through the Schleuse in the Krakauer Vorstadt. The southern chamber, built 1906–1909, is 220 m long and 17.5 m wide, while the northern chamber completed in 1970 measures 170 m by 12.1 m. A central control stand sits between the two basins.

The southern chamber, built between 1906 and 1909, is 220 metres long and 17.5 metres wide, sized so that whole tug-and-barge convoys could pass in one go instead of being locked barge by barge. The northern chamber, finished in 1970, measures 170 by 12.1 metres. Today only recreational craft use this lock; commercial shipping goes through the Krakauer Vorstadt lock.