Independence

Following the war, popular pressure for independence intensified. The office of Prime Minister of Ceylon was created in advance of independence on 14 October 1947, Don Stephen Senanayake being the first prime minister. On 4 February 1948 the country won its independence as the Dominion of Ceylon. The island enjoyed good relations with the United Kingdom and had the British Royal Navy stationed at Trincomalee.

On 21 July 1960 Sirimavo Bandaranaike took office as prime minister, and became the world's first female prime minister and the first female head of government in post-colonial Asia. In 1972, during Sirimavo Bandaranaike's second term as prime minister, the country became a republic within the Commonwealth, and the name was changed to Sri Lanka.