Klang Valley or now its call Greater Klang Valley (GKV) is the one of the most populated place in Malaysia. In the most recent census, the population in the Klang Valley had expanded to 4.7 million, and in 2006, the population in this area is estimated to be 6.0 million. Most recent calculation in 2010 shows further increase and Klang Valley is now home to roughly 8.1 million.

The placed included in GKV is Federal Territories of KL, Gombak district, Petaling district, Hulu Langat distrisct, and Klang district. It is defined as an area covered by 10 municipalities surrounding Kuala Lumpur, each governed by local authorities - Kuala Lumpur City Hall (DBKL), Perbadanan Putrajaya, Shah Alam City Council (MBSA), Petaling Jaya City Council (MBPJ), Klang Municipal Council (MPK), Kajang Municipal Council(MPKj), Subang Jaya Municipal Council (MPSJ), Selayang Municipal Council, Ampang Jaya Municipal Council (MPAJ) and Sepang Municipal Council (MPSp).