Low Thia Khiang is a Singaporean former politician who served as secretary-general of the Workers' Party (WP) from 2001 to 2018. A prominent figure in opposition politics, Low was elected to Parliament in the 1991 general election as the Member of Parliament (MP) for Hougang Single Member Constituency (SMC), a position he held for two decades before contesting in Aljunied Group Representation Constituency (GRC) in 2011. That year, he led a landmark victory that saw the WP secure the first GRC won by an opposition party, representing the Bedok Reservoir–Punggol division of Aljunied GRC until his retirement from electoral politics in 2020. His tenure in Parliament, spanning 29 years, remains the longest of any opposition MP in Singapore's post-independence history.