The British Raj was the rule until 1947 by the British Empire in Southeast India. "Raj" is a word in Hindi that means "rule". so "British Raj" means rule by the British Empire in Southern Asia. The area is now in India, Pakistan, Bangladesh, Sri Lanka and Myanmar. The British Raj is also called the British Indian Empire or the Indian Empire.

The term "British Raj" is used for the direct British rule over areas which had been conquered by the British, known as British India. That included the British influence over many independent princely states. Those areas were governed by their own traditional rulers under the overall authority of the British crown.

Undivided India is another term to mean the whole area of British rule, but it does not take in Burma, which became in 1937 its own British colony. The colony of Aden came under the same government in India from 1858 to 1937, and the same was true for British Somaliland (now part of Somalia) from 1884 to 1898 and Singapore from 1858 to 1867.

British rule ended on 15 August 1947. The borders between India and Pakistan came into effect on the 18 August. Many people died during the partition of India.

Jammu and Kashmir, like the other princely states, had not been under direct British rule. India and Pakistan went to war over this area, which is now divided between them.

The 1861 census showed that the British population in the subcontinent was 125,945. Only 41,862 of them were civilians as compared with 84,083 European officers and men of the Army. In 1880, the standing Indian Army consisted of 66,000 British soldiers, 130,000 natives, and 350,000 soldiers in the princely armies.