Constitution of Singapore in the context of "Written constitution"

The self-governance of Singapore was carried out in several stages. Since the founding of Singapore in 1819, Singapore had been under the colonial rule of the British. The first local elections on a limited scale for several positions in the government of Singapore started in 1948 following an amendment to the Constitution of Singapore.

This was further amended with the Rendel Constitution, strengthening local representation. Singapore was granted full internal self-government in 1959, but the colonial administration still controlled external relations and shared control of several key internal policies such as internal security.

The government of Singapore is defined by the Constitution of the Republic of Singapore to consist of the President and the Executive. Executive authority of Singapore is vested in the President but exercised on the advice of the Cabinet led by the Prime Minister. The President, acting as the Head of State, may only act in their discretion in appointing the Prime Minister, acting as the Head of Government; as well as withholding consent for the dissolution of Parliament; along with performing key checks on the Government in addition to the ceremonial duties of the Head of State inherited from the Westminster system. The Cabinet, consisting of the Prime Minister and ministers appointed by the President on the Prime Minister's advice, is responsible for heading the Executive through ministries and other statutory boards. At the end of the term or at any time during the term, once the President has consented to a request made by the Prime Minister to dissolve Parliament, Parliamentary General Elections are held to elect members of Parliament for a new term. The President, in their discretion, then appoints a Prime Minister who is a member of Parliament representing any political party or coalition of political parties who in their judgement is likely to command the confidence of the majority of the members of Parliament. The Prime Minister then forms the Government and, along with the Cabinet, sets the general direction and control of the Government for the next term.

A statutory board is an autonomous agency of the Government that is established by an Act of Parliament and overseen by a government ministry. Unlike ministries and government departments that are subdivisions of ministries, statutory boards are not staffed by civil servants and have greater independence and flexibility in their operations. There are five Community Development Councils (CDCs) appointed by the board of management of the People's Association (PA) for districts in Singapore. Where there are not less than 150,000 residents in a district, the PA's board of management may designate the chairman of a CDC to be the mayor for the district that the CDC is appointed for. As it is the practice for Members of Parliament (MPs) to be appointed as Chairmen of CDCs, these MPs have also been designated as mayors. There are currently five districts in the country.

The reserves of the Government of Singapore are the investment assets of the Singaporean state, including those of Ministry of Finance and the Statutory Boards, the Monetary Authority of Singapore, GIC Private Limited (GIC), and Temasek Holdings.

In constitutional terms, the Past Reserves as a legal term refers to such reserves as existed before the sitting government came into office (the most recent handover being 23 May 2025). The president's discretion to withhold access to the Past Reserves is intended as a "second key" to ensure financial stability and restrain waste of the reserves.

The official languages of Singapore are English, Mandarin Chinese, Malay and Tamil, with the lingua franca between Singaporeans being English, the de facto main language in daily, governmental, legal, trade and commercial affairs. Among themselves, Singaporeans often speak Singlish, an English creole arising from centuries of contact between Singapore's multi-ethnic and multilingual society and its legacy of being a British colony. Linguists formally define it as Singapore Colloquial English. A multitude of other languages are also used in Singapore. They consist of several varieties of languages under the families of the Austronesian, Dravidian, Indo-European and Sino-Tibetan languages. The Constitution of Singapore states that the national language of Singapore is Malay. This plays a symbolic role, as Malays are constitutionally recognised as the indigenous peoples of Singapore, and it is the government's duty to protect their language and heritage. This is also largely due to Singapore's geographical location in the Malay Archipelago.

The three languages other than English were chosen to correspond with the major ethnic groups present in Singapore at the time: Mandarin Chinese had gained pre-eminent status (over the Southern Chinese dialects of the overseas Chinese) since the introduction of Chinese-medium schools; Malay was deemed the "most obvious choice" for the Malay community; and Tamil for the largest Indian ethnic group in Singapore, in addition to being "the language with the longest history of education in Malaysia and Singapore". In 2009, more than 20 languages were identified as being spoken in Singapore, reflecting a rich linguistic diversity in the city. Singapore's historical roots as a trading settlement gave rise to an influx of foreign traders, and their languages were slowly embedded in Singapore's modern day linguistic repertoire.

Malay Singaporeans (Malay: Orang Melayu Singapura) are Singaporeans of Malay ancestry, including those from the Malay Archipelago. As of the 2020 census, they constitute approximately 13.5% of the country's residents, making them the second largest ethnic group in Singapore. Under the Constitution of Singapore, they are recognised by the government as the indigenous people of the country, with Malay as the national and official language of Singapore.

At the time of the arrival of British colonial official Stamford Raffles in 1819, the estimated population of Malays on the island was approximately 1,000. Another estimate suggests that at the time of Raffles' arrival, the population comprised around 120 Malays, 30 Chinese and some local indigenous Orang Laut tribes. From the nineteenth century until World War II, the Malays generally enjoyed favourable treatment, as they were not resettled for labour and their traditional lifestyles were largely left undisturbed. However, as the British required coolies to support their colonial enterprises, immigration rates among Malays remained relatively low compared to Indians and Chinese immigrants. The latter group notably became the majority ethnic population by the mid-nineteenth century.

General elections in Singapore must be held within three months after five years have elapsed from the date of the first sitting of a particular Parliament of Singapore, as per the Constitution. However, Parliament can also be dissolved and a general election called at the behest of the Prime Minister before the five-year period elapses. The number of constituencies or electoral divisions is not permanently fixed by law, but is declared by the Prime Minister prior to each general election pursuant to the Parliamentary Elections Act (Cap. 218, 2011 Rev. Ed.), which governs the conduct of elections to Parliament, taking into account recommendations of the Electoral Boundaries Review Committee.

In Singapore, the Parliament is unicameral. For the 2025 general election, there are 97 elected seats in Parliament organised into 15 Single Member Constituencies (SMCs) and 18 Group Representation Constituencies (GRCs). Each SMC returns one Member of Parliament (MP) while each GRC returns between three and six MPs, at least one of whom must be from the Malay, Indian or other minority communities. A group of persons wishing to stand for election in a GRC must all be members of the same political party, or a group of independent candidates. The voting age in Singapore is 21, although the age of majority is 18.

There are three general sources of Singapore law: legislation, judicial precedents (case law), and custom.

Legislation is divided into statutes and subsidiary legislation. Statutes are written laws enacted by the Singapore Parliament, as well as by other bodies that had power to pass laws for Singapore in the past. Statutes enacted by these other bodies may still be in force if they have not been repealed. One particularly important statute is the Constitution of the Republic of Singapore, which is the supreme law of Singapore. Any law the Legislature enacts after the commencement of the Constitution that is inconsistent with it is, to the extent of the inconsistency, void. Subsidiary legislation, also known as "delegated legislation" or "subordinate legislation", is written law made by ministers or other administrative agencies such as government departments and statutory boards under the authority of a statute (often called its "parent Act") or other lawful authority, and not directly by Parliament.

Under the Constitution of Singapore, the judicial system of Singapore is divided into the Supreme Court which comprises the Court of Appeal and the High Court, and the subordinate courts, namely the State Courts and Family Justice Courts - collectively known as SG Courts.

As one of the three branches of the Singapore government, the judiciary enforces and interprets the laws, ensuring that all are equal before the law and have access to justice. The judiciary is headed by the Chief Justice.

General elections were held in Singapore on 30 May 1959 to elect all 51 members of the Legislative Assembly. They were the first general elections after Singapore was granted full internal self-government from the United Kingdom, excluding matters of defence and foreign affairs. Prior to the elections, the constitution was revised, known as the Singapore (Constitution) Order in Council 1958. Along with a wholly elected Legislative Assembly, it also created the position of the Yang di-Pertuan Negara as head of state and a Prime Minister as head of government. Voting was made compulsory for the first time, leading to a voter turnout of 90.07%, a significant increase from 52.66% in 1955.

The People's Action Party (PAP), led by Lee Kuan Yew, achieved a landslide victory by winning 43 of the 51 seats and securing 54.08% of the popular vote. The PAP, which benefited from the support of trade unions and Chinese-speaking working-class voters, had focused on completely ending colonial rule, expanding public housing and education, creating jobs through industrialisation and fostering racial harmony as its platform. Its main opponent, Lim Yew Hock's Singapore People's Alliance (SPA), which had some former members of the Labour Front (LF), secured only four seats. The Singaporean branch of the United Malays National Organisation (UMNO) won three seats, while other parties and independents made little headway.