The Workers' Party is a major centre-left political party in Singapore and one of the three contemporary political parties represented in Parliament, alongside the governing People's Action Party (PAP) and the opposition Progress Singapore Party (PSP). It is currently the largest and oldest opposition party in Parliament, having contested every parliamentary election since 1959 against the dominant PAP. The WP is the only political party other than the PAP with elected Members of Parliament (MPs) since the 1991 general election.

The Parliament of Singapore is the unicameral legislature of the Republic of Singapore, which governs the country alongside the president of Singapore. Largely based upon the Westminster system, the Parliament is made up of Members of Parliament (MPs) who are elected, as well as Non-constituency Members of Parliament (NCMPs) and Nominated Members of Parliament (NMPs) who are appointed. Following the 2020 general election, 93 MPs and two NCMPs from three political parties were elected to the 14th Parliament. Throughout the sitting of Parliament, nine NMPs are usually appointed by the president on a biennial basis.