Bolivia, officially the Republic of Bolivia (Spanish: República de Bolivia, IPA [re'pußlika ðe bo'lißi?a], Quechua: Bolivia, Aymara: Bolivia), named after Simón Bolívar, is a landlocked country in central South America. It is bordered by Brazil on the north and east, Paraguay and Argentina on the south, and Chile and Peru on the west.

At 424,135 mi² (1,098,580 km²), Bolivia is the world's 28th-largest country (after Ethiopia). It is comparable in size to Mauritania, and is half as large as the US state of Texas.

Bolivia has been a landlocked nation since 1879 when it lost its coastal department of Litoral to Chile in the War of the Pacific. However, it does have access to the Atlantic via the Paraguay river. An enormous diversity of ecological zones are represented within Bolivia's territory. The western highlands of the country are situated in the Andes mountains and includes the Bolivian Altiplano. The eastern lowlands include large sections of Amazonian rainforests and Chaco. The highest peak is Nevado Sajama at 6,542 metres (21,463 ft) located in the department of Oruro. Lake Titicaca is located on the border between Bolivia and Peru. The Salar de Uyuni, the world's largest salt flat, lies in the southwest corner of the country, in the department of Potosí.