The following lists events during 1991 in British Hong Kong .
1991 (MCMXCI) was a common year starting on Tuesday of the Gregorian calendar, the 1991st year of the Common Era (CE) and Anno Domini (AD) designations, the 991st year of the 2nd millennium, the 91st year of the 20th century, and the 2nd year of the 1990s decade.
British Hong Kong denotes the period during which Hong Kong was governed as a colony and British Dependent Territory of the United Kingdom. Excluding the Japanese occupation during the Second World War, Hong Kong was under British rule from 1841 to 1997. The colonial period began with the occupation of Hong Kong Island in 1841 during the First Opium War. The island was ceded by Qing China in the aftermath of the war in 1842 and established as a Crown colony in 1843. The colony expanded to the Kowloon Peninsula in 1860 after the Second Opium War and was further extended when Britain obtained a 99-year lease of the New Territories in 1898. Although Hong Kong Island and Kowloon were ceded in perpetuity, the leased area, which comprised 92 per cent of the territory, was vital to the integrity of Hong Kong that Britain agreed to transfer the entire colony to China upon the expiration of that lease in 1997. The transfer has been considered by many as marking the end of the British Empire.
