It surrounds the federal territories of Kuala Lumpur and Putrajaya, both of which were previously part of Selangor.
In the 17th century, the Bugis from Sulawesi started to settle and gain power in the region.
They established the present hereditary sultanate in the 1740s.
The state of Selangor has the largest economy in Malaysia in terms of gross domestic product (GDP) with RM 239.968 billion (roughly USD 55.5 billion) in 2015, making up 22.6% of the total GDP of Malaysia.
This state is also the most developed in Malaysia with good infrastructure such as highways and transport.
The Federated Malay States evolved into the Federation of Malaya in 1948, which became independent in 1957, and Malaysia in 1963.