Lee Hsien Loong (IPA: LEE SYEN-LONG; born 10 February 1952), also known by his initials LHL, is a Singaporean politician and former military officer who has served as the Senior Minister of Singapore since 2024, having previously served as the third Prime Minister between 2004 and 2024. He also served as the secretary-general of the governing People's Action Party (PAP) between 2004 and 2024. As a Member of Parliament (MP), he has represented the Teck Ghee division of Ang Mo Kio Group Representation Constituency (GRC) since 1991, having previously represented Teck Ghee Single Member Constituency (SMC) between 1984 and 1991.
Born and raised in Singapore during British colonial rule, Lee is the eldest son of Singapore's first prime minister, Lee Kuan Yew. He graduated from Trinity College, Cambridge, in 1974 with first class honours in mathematics and a Diploma in Computer Science with distinction (equivalent to a first-class master's in computer science). He served in the Singapore Armed Forces (SAF) between 1971 and 1984, and attained the rank of Brigadier-General, completing a Master of Public Administration degree at Harvard Kennedy School in 1980. Lee discharged from the SAF in 1984 to enter politics.
Lee served in several cabinet roles under Lee Kuan Yew and Goh Chok Tong before succeeding the latter to becoming prime minister in 2004. Early in his term, his government enacted a five-day work week and extended maternity leave. He proposed building two integrated resorts to boost tourism, which resulted in the Marina Bay Sands and the Resorts World Sentosa. After the Great Recession, he managed the national economic recovery and introduced reforms to increase non-constituency members of parliament. He later led the response to the COVID-19 pandemic and the associated recession and recovery. In 2022, Singapore became the only Southeast Asian country to sanction Russia following the Russian invasion of Ukraine. His government also legalised male same-sex sexual activity by repealing Section 377A, which was already an unenforced law. In 2024, Lee stepped down and was succeeded by Lawrence Wong, who appointed him as a senior minister in his cabinet.
Lee maintained political continuity and technocratic governance while expanding social safety nets and public housing to further reduce inequality. However, critics noted his high level of control over political discourse and the use of defamation lawsuits against journalists and bloggers such as Roy Ngerng. These actions were often viewed as a way of discouraging dissent. Additionally, the introduction of the Protection from Online Falsehoods and Manipulation Act in 2019 raised concerns about a chilling effect on free speech. He also faced a public dispute with his siblings regarding their late father's house at 38 Oxley Road. Throughout his tenure, Lee remained the highest-paid head of government globally.
Lee Hsien Loong was born at KK Women's and Children's Hospital in Singapore on 10 February 1952, during the time when Singapore was a British colony. He is the eldest child of Lee Kuan Yew and Kwa Geok Choo and the patriline grandson of a retired storekeeper-turned-salesman, Lee Chin Koon (1903–1995) and Chua Jim Neo (1905–1980), a chef. His mother has ancestry from Tong'an District and Longhu while his father has ancestry from Dabu County in China.
Lee was educated at Nanyang Primary School and Catholic High School—where he played clarinet in the school band, and National Junior College before he was awarded the President's Scholarship and Singapore Armed Forces Overseas Scholarship in 1971 by the Public Service Commission (PSC) to study mathematics at Trinity College, University of Cambridge.
He was Senior Wrangler at Cambridge in 1973, and graduated in 1974 with a first class Bachelor of Arts degree in mathematics and a diploma in computer science (with distinction). His college tutor, Denis Marrian, later described Lee as "the brightest mathematician he had admitted to the college". Béla Bollobás said that Lee "would have been a world-class research mathematician", but his father did not realise this and persuaded Lee to leave the field. In an interview prior to Lee's resignation as prime minister in 2024, Lee revealed that he did not regret choosing politics over mathematics, declaring that he "had the responsibility to come back to Singapore, be part of Singapore, and do what [he] could to help the country to succeed", which was "the right thing to do".
He subsequently went on to complete a Master of Public Administration degree, becoming a Mason Fellow at Harvard University's John F. Kennedy School of Government in 1980.
Lee joined the Singapore Armed Forces (SAF) in 1972, and served as a commissioned officer between 1974 and 1984, and held various staff and command posts, including Director of the Joint Operations and Plans Directorate, and Chief of Staff of the General Staff.
He also attended the United States Army Command and General Staff College at Fort Leavenworth in 1978.
Lee rose quickly through the ranks in the Singapore Army, becoming the youngest brigadier-general in Singapore's history after his promotion in July 1983 at the age of 31.
Notably, he was put in command of the rescue operations following the Sentosa cable car disaster. Lee served as commanding officer of the 23rd Battalion Singapore Artillery in the Singapore Army before he left the SAF in 1984 for politics.
During the 1980s, Lee was regarded as the core member of the next batch of new leaders in the People's Action Party (PAP) leadership transition that was taking place in the mid-1980s, as Lee Kuan Yew had declared that he would step down as prime minister in 1984. Following the 1984 general election, all of the old Central Executive Committee members except Lee Kuan Yew resigned on 1 January 1985.
Lee was first elected Member of Parliament for the Teck Ghee SMC in 1984, at the age of 32.
In 1985, he was appointed Minister of State for Trade and Industry, and Minister of State for Defence. He chaired the government's economic committee, which recommended changes to established government policies to reduce business costs, foster longer-term growth and revive the Singapore economy, which was experiencing a recession at the time. The committee's recommendations included reductions in corporate and personal taxes and the introduction of a consumption tax.
In 1986, Lee was appointed Acting Minister for Trade and Industry. In 1987, he became a full member of the Cabinet as Minister for Trade and Industry and Second Minister for Defence.
In March 1986, First Deputy Prime Minister Goh Chok Tong discussed the question with Lee on encouraging younger Singaporeans to join the party. Goh was firm that the proposed committee should attract only the right kinds of members, ruling out material rewards as an incentive. The proposed youth wing was to encourage the improvement of the system from within, which would give new members a stake in the country's future. Lee later said the establishment of the youth wing reflected concerns by the leadership that the lack of an official channel to engage with the younger generation might lead them to vote for opposition parties and potentially bring the PAP government down. The youth wing was an official "tailor-made" mechanism to allow dissenting opinions to be heard.
Lee was the first chairman of the PAP Youth Committee upon its establishment, the predecessor to Young PAP.