Petaling Jaya is geographically the heart of Klang Valley, a buffer zone between Kuala Lumpur at east and Klang at west, and Rawang at north and Putrajaya at south. The terrain is mostly lowland with partial hilly stretches that mostly meander then climb steeply. A bustling cosmopolitan hub, the population numbers over 1.5 million people when combined with KL.
Its demographic is strongly Chinese, followed by Malays then Indians with first world expatriates and blue-collar immigrants from Nepal, Myanmar, Pakistan and Bangladesh composing the rest. Temperatures usually range between 28-32°C during the day and 20°C to 24°C at night; rain falls all year round but the driest months lie between May and August.