Royal Marines Barracks Chivenor is a British military base used primarily by 3 Commando Brigade. It is situated on the northern shore of the River Taw estuary, adjacent to the South West Coast Path, on the north coast of Devon, England. The nearest towns are Barnstaple and Braunton.

3 Commando Brigade, previously called the 3rd Special Service Brigade, is a commando formation of the British Armed Forces. It is composed of Royal Marine Commandos and commando qualified personnel from the Royal Navy, British Army and Royal Air Force.