
Constituencies in Singapore are electoral divisions which may be represented by single or multiple seats in the Parliament of Singapore. Constituencies are classified as either Single Member Constituencies (SMCs) or Group Representation Constituencies (GRCs). SMCs are single-seat constituencies but GRCs have between four and six seats in Parliament.

A group representation constituency (GRC) is a type of electoral division or constituency in Singapore in which teams of candidates, instead of individual candidates, compete to be elected into Parliament as the Members of Parliament (MPs) for the constituency. The Government stated that the GRC scheme was primarily implemented to enshrine minority representation in Parliament: at least one of the MPs in a GRC must be a member of the Malay, Indian or another minority community of Singapore. In addition, it was economical for town councils, which manage public housing estates, to handle larger constituencies.

The Aljunied Group Representation Constituency is a five-member group representation constituency (GRC) in the north-eastern and eastern region of Singapore. The opposition-held GRC consists of a large part of Hougang, Paya Lebar, Serangoon Gardens, the southern half of Serangoon North as well as a portion of Bedok and a very small section of Tampines. The five divisions of the GRC are Eunos, Bedok-Reservoir Punggol, Kaki Bukit, Serangoon and Paya Lebar. Aljunied GRC is currently led by the leader of the opposition and Workers' Party chief, Pritam Singh.

Ang Mo Kio Group Representation Constituency is a five-member Group Representation Constituency (GRC) in the north eastern region of Singapore. The constituency encompasses the majority of Ang Mo Kio, Seletar Hills, the northern half of Serangoon North, a portion of northern Hougang, Jalan Kayu and a portion of Fernvale. The western portion consists of parts of the Central Catchment Nature Reserve, while in the northeastern corner, it borders the Straits of Johor with two reclaimed islands, Pulau Punggol Barat and Pulau Punggol Timor. The northeast also includes the Sengkang Floating Wetland.

Bishan–Toa Payoh Group Representation Constituency is a four-member Group Representation Constituency (GRC) located in the central region of Singapore. The GRC consists the entire areas of Bishan, Singapore, the majority of Toa Payoh, parts of Thomson, Singapore. The four divisions of the GRC are Bishan East-Sin Ming, Toa Payoh West-Thomson, Toa Payoh East and Toa Payoh Central.

Bukit Batok Single Member Constituency is a constituency covering a portion of Bukit Batok in Singapore. It existed from 1972 to 1997, when it was merged with Bukit Timah GRC. It was carved out as an SMC again ahead of the 2015 general elections. It absorbed part of Bukit Panjang, Bukit Timah & Choa Chu Kang constituencies in 1972. The incumbent MP is Murali Pillai.

Bukit Panjang Single Member Constituency is a Single Member Constituency located in the western area of Singapore. The incumbent Member of Parliament is Liang Eng Hwa

Chua Chu Kang Group Representation Constituency is a four-member Group Representation Constituency located in the western area of Singapore. The four divisions of the GRC consists of Choa Chu Kang, Bukit Gombak, Keat Hong and Brickland.

Chua Chu Kang Single Member Constituency is a defunct Single Member Constituency (SMC) located in the western region of Singapore. The constituency encompasses Choa Chu Kang New Town. It is one of the oldest surviving constituencies in Singapore, and has existed since 1959 to 2011.

The East Coast Group Representation Constituency is a five-member Group Representation Constituency in the eastern area of Singapore. The areas of the Group Representation Constituency consists of locations such as East Coast Park, Bedok, Changi, Simei, Siglap, Tampines, Pasir Ris, Chai Chee, Changi Airport and the offshore islands of Pulau Tekong, Pulau Ubin and Pedra Branca. The GRC also covers a large portion of Singapore's eastern territorial waters. The five divisions are Bedok, Siglap, Fengshan, Changi-Simei and Kampong Chai Chee.

The Holland–Bukit Timah Group Representation Constituency is a four-member Group Representation Constituency (GRC) located in the central, western and northern areas of Singapore. This GRC has received two contests since 2011, which are former presidential candidate Tan Jee Say in 2011 and the current SDP secretary-general Chee Soon Juan in 2015 who was being sued for defamation, both of which were contested under Singapore Democratic Party. The GRC consists of four divisions which includes Cashew, Bukit Timah, Ulu Pandan and Zhenghua.

Hong Kah Group Representation Constituency was a defunct five-member Group Representation Constituency located in the western area of Singapore. The constituency covered the areas of Bukit Batok, Choa Chu Kang, Upper Bukit Timah, Jurong West and Lim Chu Kang. Hong Kah GRC was formed in 1988 and dissolved in 2011 and had always been held by the People's Action Party.

Hong Kah North Single Member Constituency is a Single-Member Constituency in the Western Part of Singapore. Formerly a ward of Hong Kah GRC throughout the ward's existence, from 1991 to 2011, it was crafted out as a SMC during the 2011 elections. The incumbent MP is Amy Khor.

The Hougang Single Member Constituency is a Single Member Constituency Consisting of Hougang Aves 2,5,7 and Hougang Central located in the north-eastern area of Singapore. It is surrounded by Aljunied GRC in the south and east, and Ang Mo Kio GRC in the west. The SMC is considered a stronghold of the Workers' Party and is the longest-held opposition ward in Singapore; its current MP is Dennis Tan Lip Fong.

Jalan Besar Group Representation Constituency is a four-member Group Representation Constituency composed of several city suburbs surrounding the Central Area of Singapore. It is named after Jalan Besar, a street in Singapore that forms this GRC's centrepiece. The street itself is within the Kallang planning area, Kallang itself being part of this GRC. The GRC has four divisions consisting of Kampong Glam, Kolam Ayer, Kreta Ayer-Kim Seng and Whampoa.

Joo Chiat Single Member Constituency is a defunct Single Member Constituency (SMC) located in the eastern region of Singapore. The SMC encompasses the areas of Joo Chiat, Katong, opera estate, Siglap and a portion of telok kurau. It had previously existed from 1959 until 1988, when it was merged with neighbouring constituencies to form Bedok Group Representation Constituency. It was reformed just before the 2001 general election after being carved out from East Coast Group Representation Constituency. The seat has been held by the People's Action Party since its reformation that year and was contested again in 2006.

Jurong Group Representation Constituency is a five-member Group Representation Constituency located in the western area of Singapore. The GRC consists of a large section of Jurong, sections of Bukit Batok and areas near Upper Bukit Timah Road. The five divisions of the GRC are Bukit Batok East, Jurong Central, Taman Jurong and Clementi as well as Jurong Spring.

MacPherson Single Member Constituency is a Single Member Constituency located in the central area of Singapore. It existed from 1968 to 1991 as an independent ward, was merged with Marine Parade GRC until 2011, and became an independent SMC again for the 2015 general elections. As of 2020, it retains its status as a SMC.

The Marine Parade Group Representation Constituency is a five-member Group Representation Constituency (GRC) located in the central, eastern and north-eastern areas of Singapore. The constituency consists of a section of Bedok, Chai Chee, Geylang, Kaki Bukit, Kallang, Kembangan, Marine Parade, Mountbatten, Ubi, Serangoon and Hougang. There are a total of 5 divisions in this GRC: Marine Parade, Geylang Serai, Braddell Heights, Joo Chiat and Kembangan-Chai Chee.

Marsiling–Yew Tee Group Representation Constituency is a four-member Group Representation Constituency (GRC) in the north-western part of Singapore. The constituency encompasses Chua Chu Kang, Sungei Kadut Industrial Area, Kranji, Woodlands Checkpoint, and the west part of Woodlands.The four divisions of the GRC are Limbang, Marsiling, Yew Tee and Woodgrove.

Marymount Single Member Constituency is a Single Member Constituency located in the central area of Singapore formed in 2020. The constituency is carved out from Bishan–Toa Payoh GRC. The incumbent MP is Gan Siow Huang.

Mountbatten is a single-member constituency in the central-southeastern part of Singapore. It was formerly a ward of Marine Parade GRC from 1997 till 2011. It was carved out to be a SMC again in the 2011 election. The incumbent Member of Parliament is Lim Biow Chuan.

Nee Soon Central Single Member Constituency is a defunct Single Member Constituency in the northern area in Singapore. The seat consists of Yishun Town Centre, Neighbourhood 6 and part of Neighbourhood 7. Its last Member of Parliament is Ong Ah Heng of the People's Action Party who held the seat from 1997 to 2011. The constituency was formed in 1988 and has been held by the ruling party from 1988 to 1991 when the People's Action Party lost the seat to Singapore Democratic Party's Cheo Chai Chen but Cheo lost to Ong in 1997 Singapore general election. It had disappeared in 2011 when Nee Soon Central, Nee Soon East, Nee Soon South, Chong Pang and Canberra had merged into a newly formed Nee Soon GRC.

Nee Soon East Single Member Constituency is a defunct Single Member Constituency in the northern area in Singapore. The ward consists of Yishun's Neighbourhoods 2, 3 and 4. The SMC was the largest in the nation with over 32,000 voters. Formed in 2001 after being carved out from Sembawang Group Representation Constituency, its Member of Parliament was People's Action Party's Ho Peng Kee. It disappeared in 2011 when Nee Soon Central, Nee Soon East, Nee Soon South, Chong Pang and Canberra merged into a newly formed Nee Soon GRC. This SMC and Née Soon Central SMC were formerly under the Sembawang-Née Soon Town Council, which comprises Sembawang GRC and Née Soon Central SMC from 2001 until 2011.

Nee Soon Group Representation Constituency is a five-member Group Representation Constituency (GRC) in the north region of Singapore. The GRC includes most of Yishun town, the private residential areas along Sembawang Road and Upper Thomson Road, the southern part of Sembawang.The GRC consists of five divisions:Chong Pang, Nee Soon Central, Nee Soon East, Nee Soon South and Nee Soon Link.

Pasir Ris–Punggol Group Representation Constituency is a five-member Group Representation Constituency (GRC) in the north-eastern region of Singapore. The constituency currently consists of Pasir Ris and parts of the Punggol town area. There are a total of 5 divisions in the GRC. They are Pasir Ris Central, Pasir Ris West, Pasir Ris East, Punggol Shore and Punggol Coast.

Pioneer Single Member Constituency is a Single-Member Constituency in the western part of Singapore. It was a former ward of West Coast Group Representation Constituency from 2001 until 2011, when it was carved out as a standalone SMC during the 2011 elections. The SMC is entirely surrounded in all sides by the West Coast GRC. The incumbent MP is Patrick Tay.

Potong Pasir Single Member Constituency is a Single Member Constituency (SMC) in the central region of Singapore. Established in 1968, this constituency encompasses the neighbourhoods of Potong Pasir and Joo Seng, the Sennett and Tannery private estates, as well as the entire HDB estate of Bidadari since 2020. The People's Action Party (PAP)'s Sitoh Yih Pin has been the Member of Parliament (MP) for Potong Pasir SMC since 2011. It was carved out of Aljunied in 1968.

Punggol East Single Member Constituency was a former Single Member Constituency located in the north-eastern area of Singapore. Despite its name, the ward did not cover the town of Punggol but rather the neighbourhood of Rivervale, the eastern area of Sengkang. This ward was carved out during the 2011's General Election and was formerly a ward from the Pasir Ris–Punggol GRC.

Punggol West Single Member Constituency is a Single Member Constituency located in the north-eastern area of Singapore formed in 2020. The constituency is carved out from Pasir Ris–Punggol GRC. The incumbent MP is Sun Xueling.

Radin Mas Single Member Constituency is a Single Member Constituency located in the central area of Singapore. The ward covers a portion of Bukit Merah, specifically the suburbs of Redhill, Bukit Merah Central, the eastern half of Telok Blangah, Bukit Purmei Estate and Mount Faber. This ward has been carved out during the 2011 General Election and was formerly a ward from the Tanjong Pagar GRC. The incumbent MP is Melvin Yong.

Sembawang Group Representation Constituency is a five-member Group Representation Constituency (GRC) located in the northern area of Singapore. The GRC consists of five divisions: Sembawang Central, Sembawang West, Woodlands, Admiralty and Canberra divisions. It also encompasses a section of Singapore's northern territorial waters in the Straits of Johor.

Sengkang Group Representation Constituency is a four-member Group Representation Constituency (GRC) in the north-eastern region of Singapore. The constituency consists parts of the Sengkang town area. The four divisions of the GRC are Anchorvale, Rivervale, Compassvale and Buangkok.

Sengkang West Single Member Constituency was a former Single Member Constituency located in the north-eastern region of Singapore. The ward covers the western area of Sengkang, between Sengkang East Road and Fernvale Road. This ward was carved out during the 2011 General Election and was formerly a ward from the Ang Mo Kio GRC.

Tampines Group Representation Constituency is a five-member Group Representation Constituency (GRC) in the eastern region of Singapore. The GRC encompasses Tampines with five divisions -Tampines East, Tampines West, Tampines Central, Tampines North and Tampines Changkat. The electoral boundaries remained unchanged between the 2001 elections until early 2020 when its boundaries were redrawn to include Tampines retail park from the neighbouring Pasir Ris–Punggol GRC. The GRC has faced a contest in every general election except 1997, in which the National Solidarity Party was disqualified. In the 2001 and 2006 general elections, the PAP's opponent was the Singapore Democratic Alliance.

Tanjong Pagar Group Representation Constituency is currently a five-member Group Representation Constituency (GRC) in Central and Western Singapore. The five divisions consists of Buona Vista, Queenstown, Moulmein-Cairnhill, Tanjong Pagar-Tiong Bahru and Henderson-Dawson; it notably contains the electoral division where the late founding prime minister Lee Kuan Yew stood from his debut in 1955 until his death on 23 March 2015, after serving for 60 years.

The 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-Gek Poh, West Coast, Boon Lay, Nanyang and Telok Blangah. West Coast GRC covers the areas of Ayer Rajah, Dover, Pasir Panjang, the south-western area, West Coast, Jurong, Jurong Island, Sentosa, Telok Blangah, Tuas and much of Singapore's southern & western territorial waters and offshore islands in the area.

Yio Chu Kang Single Member Constituency is a single member constituency in the north-eastern area, Singapore. The constituency currently consists of Ang Mo Kio and Lentor Estate/Far Horizon Gardens. The incumbent Member of Parliament is Yip Hon Weng.

Yuhua Single Member Constituency is a Single Member Constituency located in the western area of Singapore. The ward covers the area of Yuhua and Parts of the developing Jurong Gateway District. This ward, formerly part of Jurong GRC, was carved out during the 2011 General Election to be contested as an SMC. The incumbent Member of Parliament is Grace Fu.