The British Military Administration (BMA) was the interim administrator of British Malaya from August 1945, the end of World War II, to the establishment of the Malayan Union in April 1946. The BMA was under the direct command of the Supreme Allied Commander South East Asia, Lord Louis Mountbatten. The administration had the dual function of maintaining basic subsistence during the period of reoccupation, and also of imposing the state structure upon which post-war imperial power would rest.

The term "British Malaya" loosely describes a set of states on the Malay Peninsula and the island of Singapore that were brought under British hegemony or control between the late 18th and the mid-20th century. Unlike the term "British India", which excludes the Indian princely states, British Malaya is often used to refer to the Federated and the Unfederated Malay States, which were British protectorates with their own local rulers, as well as the Straits Settlements, which were under the sovereignty and direct rule of the British Crown, after a period of control by the East India Company.