Petaling Jaya (PJ) is a major Malaysian city in Selangor, originally developed as a satellite township for Kuala Lumpur in 1952 to address overpopulation [1, 2]. It gained city status on June 20, 2006 [1, 3]. Colloquially known as "PJ," it is part of the Greater Kuala Lumpur area and is recognized as one of the country's most industrialized and prosperous cities, serving as a significant commercial and residential hub [2]. Its strategic location near the capital has contributed to its rapid growth and continued appeal, transforming it into a self-sufficient metropolis within the Klang Valley [3].

Initially built on a rubber estate, Petaling Jaya's development began with the construction of 800 houses in what is now known as "Old Town." Over the decades, it expanded rapidly due to rural-urban migration, leading to the establishment of numerous residential and commercial sections [3]. Today, PJ is characterized by a blend of modern infrastructure, extensive amenities, and a diverse population, making it a prominent urban center in Malaysia [1].

• Population: 807,879 (January 2024) [1].
• Total Area: 97.2 km² (37.5 sq mi) [1, 2].
• City Status Granted: June 20, 2006 [1, 3].
• Time Zone: Malaysia Time (MYT), UTC+08:00 [4].
• Average Annual Rainfall: Over 3,300 mm (130 in) [1].
• Ethnic Diversity: Home to Malays, Chinese, Indians, Eurasians, Kadazans, Ibans, and other indigenous races [1].
• Government: Administered by the Petaling Jaya City Council (MBPJ) [1].
• Postal Codes: 46xxx, 473xx, 474xx, 478xx, 52xxx [1, 5].

The local administration of Petaling Jaya is managed by the Petaling Jaya City Council (Majlis Bandaraya Petaling Jaya, MBPJ) [1]. The Council consists of 25 members who are appointed by the Selangor State Executive Council. These council members are responsible for the well-being of their respective areas and report to the council on necessary actions [2]. They also hold specific roles within various committees, including finance, technology, town planning, and economic development [2].

The Mayor, an officer of the Federal Government, leads the council with the assistance of a Deputy Mayor and departmental heads, overseeing the implementation of the Council's vision, mission, and policies [3]. The MBPJ also approves legislative drafts and policies to be executed by its numerous departments and units, ensuring systematic governance and urban development [2]. Petaling Jaya was granted city status in 2006, evolving from its earlier designation as a Township Board and then a Municipal Council [3].

Petaling Jaya has developed into a highly industrialized and prosperous city, driven by sectors such as manufacturing, construction, and services [2]. The city’s economy saw significant growth with the establishment of numerous shopping malls starting in the 1980s, including popular centers like The Atria, 1 Utama, Sunway Pyramid, and Paradigm Mall, which house a variety of retail and entertainment options [1]. These commercial developments have made PJ a significant shopping destination within the Klang Valley [6].

Major property developers are active in the city, with a shift from low-cost housing to luxurious condominiums and semi-detached houses in areas like Bukit Gasing, Section 16 & 17, and SS7 Kelana Jaya [1]. Petaling Jaya also hosts headquarters for many federal government departments and media companies such as Star Media Group and Media Prima Berhad, further contributing to its economic dynamism and job creation [1]. The strategic location and robust infrastructure continue to attract investment and foster economic growth [2].

Petaling Jaya boasts a comprehensive infrastructure system, particularly in transportation. The city is served by an extensive public transportation network including bus services operated by Rapid Bus under the Rapid KL brand, offering free PJ City Bus services funded by the City Council [1]. Additionally, it has multiple rapid transit lines, with seven stations on the LRT Kelana Jaya Line serving central and southern Petaling Jaya, and stations on the MRT Kajang Line and MRT Putrajaya Line serving the northern parts, also known as Damansara [1]. The upcoming LRT Shah Alam Line, set to open in 2025, will further expand rail connectivity in central and western PJ [1].

The city also has excellent road connectivity with three access points to the national highway system, including the North–South Expressway Northern Route, and internal highways such as the Damansara–Puchong Expressway, Sprint Expressway, and the Federal Highway [1]. The Sultan Abdul Aziz Shah Airport, located immediately to the west of Petaling Jaya, provides convenient air travel accessibility [1]. This well-developed infrastructure supports the city's role as a major commercial and residential hub in the Klang Valley.