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Solomon Islands, also known simply as the Solomons, is a country consisting of 21 major islands Guadalcanal, Malaita, Makira, Santa Isabel, Choiseul, New Georgia, Kolombangara, Rennell, Vella Lavella, Vangunu, Nendo, Maramasike, Rendova, Shortland, San Jorge, Banie, Ranongga, Pavuvu, Nggela Pile and Nggela Sule, Tetepare, (which are bigger in area than 100 square kilometres) and over 900 smaller islands in Melanesia, part of Oceania, to the northeast of Australia. It is directly adjacent to Papua New Guinea to the west, Australia to the southwest, New Caledonia and Vanuatu to the southeast, Fiji, Wallis and Futuna, and Tuvalu to the east, and Nauru and the Federated States of Micronesia to the north. It has a total area of 28,896 square kilometres (11,157 sq mi), and a population of 734,887 according to the official estimates for mid 2023. Its capital and largest city, Honiara, is located on the largest island, Guadalcanal. The country takes its name from the wider area of the Solomon Islands archipelago, which is a collection of Melanesian islands that also includes the Autonomous Region of Bougainville (currently a part of Papua New Guinea), but excludes the Santa Cruz Islands.

The islands have been settled since at least some time between 30,000 and 28,800 BC, with later waves of migrants, notably the Lapita people, mixing and producing the modern indigenous Solomon Islanders population. In 1568, the Spanish navigator Álvaro de Mendaña was the first European to visit them. Though not named by Mendaña, it is believed that the islands were called "the Solomons" by those who later received word of his voyage and mapped his discovery. Mendaña returned decades later, in 1595, and another Spanish expedition, led by Portuguese navigator Pedro Fernandes de Queirós, visited the Solomons in 1606.

In June 1893, Captain Herbert Gibson of HMS Curacoa declared the southern Solomon Islands a British protectorate. During World War II, the Solomon Islands campaign (1942–1945) saw fierce fighting between the United States, British Imperial forces, and the Empire of Japan, including the Battle of Guadalcanal.

The official name of the then-British administration was changed from the " British Solomon Islands Protectorate " to "The Solomon Islands" in 1975, and self-government was achieved the following year. Independence was obtained, and the name changed to just "Solomon Islands" (without the definite article), in 1978. At independence, Solomon Islands became a constitutional monarchy. The King of Solomon Islands is Charles III, who is represented in the country by a governor-general appointed on the advice of the Prime Minister.