Selangor, also known by the Arabic honorific Darul Ehsan, or "Abode of Sincerity", is one of the 13 states of Malaysia. It is on the west coast of Peninsular Malaysia and is bordered by Perak to the north, Pahang to the east, Negeri Sembilan to the south, and the Strait of Malacca to the west. Selangor surrounds the federal territories of Kuala Lumpur and Putrajaya, both of which were previously part of it. Selangor has diverse tropical rainforests and an equatorial climate. The state's mountain ranges belong to the Titiwangsa Mountains, which is part of the Tenasserim Hills that covers southern Myanmar, southern Thailand and Peninsular Malaysia, with Mount Semangkok as the highest point in the state.

Malaysia is a country in Southeast Asia. The federal constitutional monarchy consists of 13 states and three federal territories, separated by the South China Sea into two regions: Peninsular Malaysia and Borneo's East Malaysia. Peninsular Malaysia shares a land and maritime border with Thailand and maritime borders with Singapore, Vietnam, and Indonesia. East Malaysia shares land and maritime borders with Brunei and Indonesia, as well as a maritime border with the Philippines and Vietnam. Kuala Lumpur is the national capital, the country's largest city, and the seat of the legislative branch of the federal government. Putrajaya is the administrative centre, which represents the seat of both the executive branch and the judicial branch of the federal government. With a population of over 33 million, the country is the world's 43rd-most populous country. Malaysia is tropical and is one of 17 megadiverse countries; it is home to numerous endemic species. Tanjung Piai in the Malaysian state of Johor is the southernmost point of continental Eurasia.