Laos, officially the Lao People's Democratic Republic (Lao PDR or LPDR), is the only landlocked country in Southeast Asia. At the heart of the Indochinese Peninsula, Laos is bordered by Myanmar and China to the northwest, Vietnam to the east, Cambodia to the southeast, and Thailand to the west and southwest. Its capital and largest city is Vientiane.

Present-day Laos traces its historic and cultural identity to Lan Xang, which existed from the 13th century to the 18th century as one of the largest kingdoms in Southeast Asia. Because of its central geographical location in Southeast Asia, the kingdom became a hub for overland trade and became wealthy economically and culturally. After a period of internal conflict, Lan Xang broke into three separate kingdoms: Luang Phrabang, Vientiane, and Champasak. In 1893, the three kingdoms came under a French protectorate and were united to form what is now known as Laos.

Laos was occupied by Japan during World War II and briefly regained independence in 1945 as a Japanese puppet state but was re-colonised by France until it won autonomy in 1949. It regained independence in 1953 as the Kingdom of Laos, with a constitutional monarchy under Sisavang Vong. A civil war began in 1959, which saw the communist Pathet Lao, supported by North Vietnam and the Soviet Union, fight against the Royal Lao Armed Forces, supported by the United States. After the Vietnam War ended in 1975, the Lao People's Revolutionary Party came to power, ending the civil war and the monarchy. Laos was then dependent on military and economic aid from the Soviet Union until its dissolution in 1991.

Laos is a member of the Asia-Pacific Trade Agreement, the ASEAN, East Asia Summit, and La Francophonie. Laos applied for membership of the World Trade Organization in 1997; on 2 February 2013, it was granted full membership. It is a one-party socialist republic, espousing Marxism–Leninism and governed by the Lao People's Revolutionary Party, under which non-governmental organisations have routinely characterised the country's human rights record as poor, citing repeated abuses such as torture, restrictions on civil liberties and persecution of minorities.

The politically and culturally dominant Lao people make up 53.2% of the population, mostly in the lowlands. Mon-Khmer groups, the Hmong, and other indigenous hill tribes live in the foothills and mountains. Laos's strategies for development are based on generating electricity from rivers and selling the power to its neighbours, namely Thailand, China, and Vietnam, as well as its initiative to become a "land-linked" nation, as evidenced by the construction of four new railways connecting Laos and neighbours. Laos has been referred to as one of Southeast Asia and Pacific's fastest-growing economies by the World Bank with annual GDP growth averaging 7.4% since 2009, despite being classified as a least developed country by the United Nations.

Etymology

The word Laos was coined by the French, who united the three Lao kingdoms in French Indochina in 1893. The name of the country is spelled the same as the plural of the dominant and most common ethnic group, the Lao people. In English, the "s" in the name of the country is pronounced, and not silent. In the Lao language, the country's name is Muang Lao (ເມືອງລາວ) or Pathet Lao (ປະເທດລາວ), both of which literally mean 'Lao Country'.