The Kingdom of Cambodia, formerly known as Kampuchea, is a country in Southeast Asia that borders Thailand to the west and northwest, Laos to the north, Vietnam to the east and southeast, and the Gulf of Thailand to the south. The geography of Cambodia is dominated by the Mekong River and the Tonlé Sap.

Cambodia is a constitutional monarchy with Norodom Sihamoni as King. Phnom Penh is the kingdom's capital and largest city, and is the principal center for the country's economical, industrial, commerce and cultural center of Cambodia. Siem Reap, a city located near the famous ruins of Angkor Wat is the gateway to the Angkor region, and is Cambodia's main destination for tourism. Battambang, the largest city in western Cambodia, is known for its rice production, and Sihanoukville, a coastal city, is the primary sea port and beach resort.

Cambodia has an area of approximately 181,035 square kilometres (69,898 sq mi) and a population of over 14 million ethnic Khmer. A citizen of Cambodia is usually identified as "Cambodian" or "Khmer", though the latter strictly refers to ethnic Khmers. Most Cambodians are Theravada Buddhists, but the country also has a substantial number of predominantly Muslim Cham, as well as ethnic Chinese, Vietnamese and small animist hill tribes.