High Command of Coastal Defence (German: Küstenverteidigung) was an army level command of the German Army in World War I.

The High Command of Coastal Defence was set up on 14 April 1916, with headquarters in Hamburg, to guard against the possibility of an attack on the German coast (North Sea or Baltic Sea) or mainland Denmark.

It was to maintain the coastal defences in a state of readiness and to assemble a defensive army if needed.

[2][3] From September 1916, it also commanded those bordering the Netherlands (VII Corps District and VIII Corps District).

On 18 September 1918, the post of Supreme Commander was discontinued; on 1 November 1918, the High Command was taken off active status and was dissolved on 24 January 1919.