Before any Singapore general election, the country is divided into constituencies, and the shape of those constituencies is set out on an official map. Understanding electoral boundaries and the EBRC in Singapore explains where that map comes from and who draws it. The EBRC, or Electoral Boundaries Review Committee, is the body that reviews and recommends the boundaries used at an election. This guide explains what the committee is, how the process works, and the official rationale behind it. It describes the system neutrally and directs you to the Elections Department and official releases for current details.
Why Electoral Boundaries Matter
An electoral boundary is simply the line that defines a constituency: the area whose voters elect a Member or a team of Members of Parliament. Because Singapore’s population is not evenly distributed and changes over time, with new housing estates built and older areas changing in size, the boundaries have to be reviewed periodically so that constituencies remain workable. Boundaries determine which voters belong to which constituency and how many Members each area returns.
Boundaries interact with the two types of constituency, the Single Member Constituency and the Group Representation Constituency. When boundaries are drawn, part of the task is deciding how the country is divided into these seats and how large each one is. The result is the electoral map that candidates contest and voters use on polling day.
What the EBRC Is
The Electoral Boundaries Review Committee is the committee convened to review the boundaries and recommend the constituencies for an election. It is typically made up of senior civil servants rather than politicians, and it is convened when a review is to be carried out ahead of a general election. The committee studies the distribution of voters and other relevant considerations, then produces a report recommending the boundaries, the constituencies, and how they are arranged into SMCs and GRCs.
A few points help place the committee accurately. The EBRC makes recommendations; the boundaries take effect through the official process that follows, and the committee’s report is published. The committee is convened for the purpose of a review rather than existing as a permanent standing body, and the details of its membership and terms of reference are set at the time it is formed. For the authoritative description of the committee and its work, the Elections Department and the official reports are the right sources.
How the Process Works
While the precise steps are set out in official materials, the process can be described in general terms. It usually begins when the committee is convened to undertake a review. The committee then examines the relevant data, including how voters are distributed across the country, and considers factors such as significant population shifts and the development of new areas. On that basis, it prepares recommendations for the constituencies and their boundaries.
The committee’s recommendations are set out in a report that is made public. The constituencies for the election are then determined through the official process, and the Elections Department administers the election on the resulting map. The number of SMCs and GRCs, the size of each GRC, and the total number of Members of Parliament are outcomes of this exercise, and they are set for that election rather than fixed permanently.
- The committee is convened ahead of a general election.
- It reviews voter distribution and relevant considerations.
- It recommends the constituencies and their boundaries.
- Its report is published, and the constituencies are settled for the election.
- The Elections Department conducts the election on the finalised map.
Because these steps and their timing can vary, and because the specific figures change from one election to the next, always check the current process and outcomes with official sources rather than relying on any single past example.
The EBRC in Context
It helps to see how the EBRC fits alongside the other bodies involved in an election. The table below compares their roles in general terms. It is an orientation rather than a complete statement of each body’s functions, so confirm specifics with official sources.
| Body | What it is | Main role in elections |
|---|---|---|
| Electoral Boundaries Review Committee | A committee convened for a review | Reviews and recommends constituency boundaries |
| Elections Department | A government department | Administers and conducts elections |
| Parliament | The legislature | Elected by voters in the constituencies |
| The electorate | Registered voters | Cast votes in their constituencies |
Read together, the table shows a division of labour: the committee recommends the map, the Elections Department runs the election, voters cast their ballots, and Parliament is the result. Each part has a defined function, and the boundaries produced by the review are the foundation on which the rest depends.
The Official Rationale and Where to Check
The official reason given for reviewing boundaries is practical: as the population grows and moves, constituencies need to be adjusted so that they remain reasonable in size and the electoral map reflects where people actually live. Reviewing boundaries before an election is the mechanism for keeping the map up to date. This guide presents that as the stated rationale of the process.
Boundary reviews attract public discussion, and people hold a range of views about how the process should work. The aim of this explainer is not to enter that debate or to take a position, but to describe accurately what the EBRC is and how boundaries come to be drawn. Anyone who wants to go deeper should turn to the primary materials: the reports of the Electoral Boundaries Review Committee, the Elections Department, the Parliamentary Elections Act and the Constitution, all available through official channels and Singapore Statutes Online.
The short version is this: the EBRC reviews and recommends the electoral boundaries, the map is finalised through the official process, and the Elections Department runs the election on it. For the current constituencies, sizes and numbers at any given election, the Elections Department is the authoritative source, and treating its published information as the reference point will always be more reliable than assuming last time’s figures still apply.
Explore more
To see how the recommended boundaries translate into the two kinds of seats, read our guide to GRCs and SMCs. For what happens after the votes are counted and the government is formed, see how the Cabinet and government ministries make up the executive branch in Singapore.