Tanzania /ˌtænzəˈniːə/, officially the United Republic of Tanzania (Swahili: Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes region. It is bordered by Kenya and Uganda to the north; Rwanda, Burundi, and the Democratic Republic of the Congo to the west; Zambia, Malawi, and Mozambique to the south; and the Indian Ocean to the east. Kilimanjaro, Africa's highest mountain, is in north eastern Tanzania.
Tanzania's population of 44.9 million is highly diverse, composed of numerous ethnic, linguistic, and religious groups. Tanzania is a presidential constitutional republic, and since 1996, its official capital has been Dodoma, where the President's Office, the National Assembly, and some government ministries are located. Dar es Salaam, the former capital, retains most government offices and is the country's largest city, its principal port, and its leading commercial center.
European colonialism began in mainland Tanzania during the late 19th century when Germany formed German East Africa, which gave way to British rule following World War I. The mainland was governed as Tanganyika, with the Zanzibar Archipelago remaining a separate colonial jurisdiction. Following their respective independence in 1961 and 1963, the two entities merged in April 1964 to form the United Republic of Tanzania.
At 947,303 square kilometres (365,756 sq mi), Tanzania is the 13th largest country in Africa and the 31st largest in the world, ranked between the larger Egypt and smaller Nigeria. It borders Kenya and Uganda to the north; Rwanda, Burundi, and the Democratic Republic of the Congo to the west; and Zambia, Malawi, and Mozambique to the south. Tanzania is located on the eastern coast of Africa and has an Indian Ocean coastline approximately 800 kilometres (500 mi) long. It also incorporates several offshore islands, including Unguja (Zanzibar), Pemba, and Mafia. The country is the site of Africa's highest and lowest points: Mount Kilimanjaro, at 5,895 metres (19,341 ft) above sea level, and the floor of Lake Tanganyika, at 352 metres (1,155 ft) below sea level, respectively.
Tanzania is mountainous and densely forested in the northeast, where Mount Kilimanjaro is located. Three of Africa's Great Lakes are partly within Tanzania. To the north and west lie Lake Victoria, Africa's largest lake, and Lake Tanganyika, the continent's deepest lake, known for its unique species of fish. To the south west lies Lake Nyasa. Central Tanzania is a large plateau, with plains and arable land. The eastern shore is hot and humid, with the Zanzibar Archipelago just offshore.
The Kalambo water falls in the south western region of Rukwa are the second highest uninterrupted fall in Africa and are located near the south eastern shore of Lake Tanganyika on the border with Zambia. The Menai Bay Conservation Area is Zanzibar's largest marine protected area.