The Petaling District is a district located in the heart of Selangor in Malaysia. Petaling is not to be confused with the city of Petaling Jaya located in it, nor the mukim of Petaling under Subang Jaya City. The district office is located in Subang.
The district of Petaling was established on 1 February 1974, the same day Kuala Lumpur was declared a Federal Territory. This district is located in the middle of the Klang Valley adjacent to the capital and thus has experienced tremendous urbanisation. Some of the original forests remain in the Bukit Cherakah Forest Reserve (including the National Botanic Gardens), Kota Damansara Community Forest Park and Bukit Gasing. During the 1991 census, it recorded 633,165 people.
The official 2010 census recorded the population of Petaling as 1,660,869 people, excluding foreigners. Petaling is 484.32 km<sup>2</sup> in area.