The main plant of the Malaysian car manufacturer Proton is located in the industrial outskirts of Shah Alam. The city is flourished as a growing urban settlement after the Proton car manufacturing plant was set up, which marked the beginning of the city as an industrial city. There are many companies who have their main plants in the industrial areas, both local and foreign in dedicated area of Shah Alam such as Section 21 and 26.
Many of Shah Alam residents work in other cities such as Subang Jaya or Kuala Lumpur
