For the Telok Ayer Rajah and Ayer Rajah Road in Penang, see Street names of George Town, Penang.
Ayer Rajah is an area located in the Queenstown Planning Area

Queenstown, Singapore

Queenstown1 is one of the early housing estates in Singapore, built before Toa Payoh and Ang Mo Kio, and was a test bed for much of Singapore's public housing...

 in the South-West part of Singapore

Singapore

Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

. It comprises an industrial estate that houses several high-tech corporations and factories

Factory

A factory or manufacturing plant is an industrial building where laborers manufacture goods or supervise machines processing one product into another. Most modern factories have large warehouses or warehouse-like facilities that contain heavy equipment used for assembly line production...

. The headquarters of StarHub Cable Vision is located in Ayer Rajah, together with its cable television

Cable television

Cable television is a system of providing television programs to consumers via radio frequency signals transmitted to televisions through coaxial cables or digital light pulses through fixed optical fibers located on the subscriber's property, much like the over-the-air method used in traditional...

 and internet

Internet

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite to serve billions of users worldwide...

 divisions. The area also houses several flatted factories, the Fusionopolis

Fusionopolis

Fusionopolis is a research and development complex located at the One-North business park in Singapore. It houses various research organizations, high-tech companies, government agencies, retail outlets, and serviced apartments in one location....

, a bus park, and the Ayer Rajah Camp at Portsdown Road. INSEAD Asia campus and the One North MRT station are new additions to the area. The Ayer Rajah Expressway

Ayer Rajah Expressway

The Ayer Rajah Expressway extends from the western end of the East Coast Parkway in the south of Singapore to Tuas in the west near the Tuas Second Link to Malaysia...

 passes through the industrial estate and took the name from the area.

Etymology

In Malay

Malay language

Malay is a major language of the Austronesian family. It is the official language of Malaysia , Indonesia , Brunei and Singapore...

, Ayer Rajah literally means the "raja's water" or the "king's water".

Politics

The area of Ayer Rajah is located within the Telok Blangah

Telok Blangah

Telok Blangah is a district in Singapore to the south-west of the Central Business District in the southern part of the island. It is part of the Bukit Merah Planning Area, an urban planning zone under the Urban Redevelopment Authority.-Etymology:...

 division of West Coast Group Representation Constituency

West Coast Group Representation Constituency

West Coast Group Representation Constituency is a five-member Group Representation Constituency located in the western area of Singapore. The GRC is divided into five divisions and is a constituency held by the People's Action Party. The five divisions are Ayer Rajah, West Coast, Boon Lay,...

 and the Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 being Minister for Trade and Industry Lim Hng Kiang

Lim Hng Kiang

Lim Hng Kiang is a politician from Singapore. A member of the governing People's Action Party , he is currently the country's Minister for Trade and Industry. He previoulsy served as the Minister for National Development , Minister for Health , and as a Minister in the Prime Minister's Office...

 since 1997, it was never located in the now defunct Ayer Rajah Single Member Constituency

Ayer Rajah Single Member Constituency

Ayer Rajah Single Member Constituency is a former single member constituency in Singapore that existed since 1980 by crafting this portion from the then Bukit Timah SMC; Ayer Rajah SMC was made up of Pandan Gardens estate, Teban Gardens estate, parts of Jurong East New Town and Clementi West New...

 during its existence from 1980 to 2006.

Instead, the SMC consisted of the area of Pandan Gardens

Pandan Gardens

Pandan Gardens is a residential neighbourhood which is part of Jurong East New Town in the West Region of Singapore...

, Teban Gardens

Teban Gardens

Teban Gardens is a residential precinct located in Jurong.Immediately north of Pandan Reservoir, it comprises exclusively public housing built by the JTC Corporation and Housing and Development Board.-Neighbouring Areas:...

 and West Coast

West Coast, Singapore

West Coast is a town located south of Clementi and west of Pasir Panjang in the Southwest Singapore. The area currently lies in the West Coast GRC.-History:...

 housing estates as well as a portion of the Pandan Loop industrial estate. From 2006 to 2011, the Ayer Rajah SMC ward has been absorbed into the West Coast Group Representation Constituency, and the Ayer Rajah division called West Coast-Ayer Rajah with its MP being S Iswaran. After 2011, the Ayer Rajah division is still within West Coast Group Representation Constituency and it is a new division.