Singapore Democratic Party

The Singapore Democratic Party (SDP) is a social liberal political party in Singapore. Founded in 1980 by Chiam See Tong, the party gained its first seat in Parliament in 1984 when Chiam was elected the MP for Potong Pasir. In the 1991 general election, the SDP achieved its peak electoral success, securing three parliamentary seats with Ling How Doong and Cheo Chai Chen winning in Bukit Gombak and Nee Soon respectively. However, internal conflicts emerged in 1993, leading to Chiam's departure from the party in 1996 to form the Singapore People's Party (SPP). He was succeeded by Chee Soon Juan, who has served as Secretary-General since then.

The SDP identifies as a centrist to centre-left party, drawing on both liberal and social democratic ideologies. Over the years, it has been shaped by different leadership styles and internal factions, particularly under Chiam and Chee, whose visions for the party diverged significantly. While some party members lean towards centre-left ideals, others align with centrist or even centre-right positions. Since the 2000s, the party has increasingly focused on promoting liberal human rights and democratic reforms.

As part of its policy platform, the SDP advocates for constitutional reforms that strengthen civil liberties and expand social protections. It promotes liberal approaches to key national issues in Singapore, including education, healthcare, and housing, and supports increased social welfare spending for Singaporeans. The party also calls for a more moderated immigration policy. Internationally, the SDP is affiliated with Liberal International and the Council of Asian Liberals and Democrats, reflecting its commitment to liberal democratic values.