The Fourth Cabinet of Lee Hsien Loong of the Government of Singapore was announced on 28 September 2015 following the 2015 general election on 11 September, and came into effect on 1 October 2015. The day after the election, Prime Minister Lee Hsien Loong told the media that he would form the Cabinet within two weeks.

Changes Position Incoming Outgoing Minister for Education Ong Ye Kung Minister for Education Ng Chee MengMinister for TransportLui Tuck YewMinister in the Prime Minister's OfficeNg Chee Meng

Cabinet

October 2015 – April 2017 Prior to the general election held on 11 September 2015, Transport Minister Lui Tuck Yew announced his retirement on 11 August. All other incumbent office holders successfully defended their parliamentary seats in the elections.;

The list of Cabinet ministers and other office-holders was announced on 28 September 2015. In a press conference, Prime Minister Lee Hsien Loong said, "I have given heavy responsibilities to the next generation of Ministers. They will be stretched and tested. They have to prove themselves and must gel together as a team. Soon after the end of this term, we must have a new team ready to take over from me."

Three veteran ministers were named Coordinating Ministers, each of them overseeing a handful of ministries. National Security – Teo Chee Hean. Economic and Social Policies – Tharman Shanmugaratnam. Infrastructure – Khaw Boon Wan. MinisterPrior to 2015AppointmentLui Tuck YewMinister for TransportRetired from politics.Khaw Boon WanMinister for National DevelopmentMoved to Minister for Transport.Lawrence WongMinister for Culture, Community and YouthMoved to Minister for National Development.Grace FuMinister in Prime Minister's Office, Second Minister for Environment and Water Resources, Second Minister for Foreign AffairsMoved to Minister for Culture, Community and Youth.Amy KhorSenior Minister of State for Health and ManpowerRelinquished Senior Minister of State for Manpower and moved to Senior Minister of State for Environment and Water Resources.Teo Ser LuckMinister of State for Trade and IndustryRelinquished Minister of State for Trade and Industry, and moved to Minister of State for Manpower. Several other ministers will have a change in duties: Vivian Balakrishnan – from Environment and Water Resources to Foreign Affairs. K. Shanmugam – from Foreign Affairs to Home Affairs, while retaining Law. Heng Swee Keat – from Education to Finance. Lawrence Wong – from Culture, Community and Youth to National Development. Masagos Zulkifli – from the Prime Minister's Office (PMO) to Environment and Water Resources. Grace Fu – from the PMO to Culture, Community and Youth.

The Ministry of Education and Ministry of Trade and Industry will each have two full ministers, covering separate aspects.

The cabinet consisted of the following members from 1 October 2015.

PortfolioPortraitName TermPrime MinisterLee Hsien Loong12 August 2004 – 15 May 2024Deputy Prime MinisterTeo Chee Hean1 April 2009 – 30 April 2019Coordinating Minister for National Security21 May 2011 – 22 May 2025Deputy Prime MinisterTharman Shanmugaratnam21 May 2011 – 30 April 2019Coordinating Minister for Economic and Social Policies1 October 2015 – 30 April 2019Coordinating Minister for InfrastructureKhaw Boon Wan1 October 2015 – 26 July 2020Minister for Transport1 October 2015 – 26 July 2020Minister for Trade and Industry (Trade)Lim Hng Kiang1 October 2015 – 30 April 2018Minister for ManpowerLim Swee Say4 May 2015 – 30 April 2018Minister for Communications and InformationYaacob Ibrahim1 November 2012 – 30 April 2018Minister-in-charge of Muslim Affairs25 March 2002 – 30 April 2018Minister for DefenceNg Eng Hen21 May 2011 – 22 May 2025Minister for Foreign AffairsVivian Balakrishnan1 October 2015 – presentMinister for Home AffairsK. Shanmugam1 October 2015 – presentMinister for Law1 May 2008 – 22 May 2025Minister for HealthGan Kim Yong21 May 2011 – 14 May 2021Minister for Trade and Industry (Industry)S. Iswaran1 October 2015 – 30 April 2018Minister for FinanceHeng Swee Keat1 October 2015 – 14 May 2021Minister for Culture, Community and YouthGrace Fu1 October 2015 – 26 July 2020Minister in the Prime Minister's OfficeChan Chun Sing9 April 2015 – 30 April 2018Minister for Social and Family DevelopmentTan Chuan-Jin9 April 2015 – 10 September 2017Minister for National DevelopmentLawrence Wong1 October 2015 – 26 July 2020Second Minister for Finance22 August 2016 – 14 May 2021Minister for the Environment and Water ResourcesMasagos Zulkifli1 October 2015 – 26 July 2020Minister for Education (Schools)Ng Chee Meng1 November 2016 – 30 April 2018Acting Minister for Education (Schools)1 October 2015 – 31 October 2016Second Minister for Transport1 November 2016 – 30 April 2018Minister for Education (Higher Education and Skills)Ong Ye Kung1 November 2016 – 30 April 2018Acting Minister for Education (Higher Education and Skills)1 October 2015 – 31 October 2016Second Minister for Defence1 November 2016 – 30 April 2018<noinclude>

May – September 2017 The cabinet consisted of the following members from 1 May 2017. PortfolioPortraitName TermPrime MinisterLee Hsien Loong12 August 2004 – 15 May 2024Deputy Prime MinisterTeo Chee Hean1 April 2009 – 30 April 2019Coordinating Minister for National Security21 May 2011 – 22 May 2025Deputy Prime MinisterTharman Shanmugaratnam21 May 2011 – 30 April 2019Coordinating Minister for Economic and Social Policies1 October 2015 – 30 April 2019Coordinating Minister for InfrastructureKhaw Boon Wan1 October 2015 – 26 July 2020Minister for Transport1 October 2015 – 26 July 2020Minister for Trade and Industry (Trade)Lim Hng Kiang1 October 2015 – 30 April 2018Minister for ManpowerLim Swee Say4 May 2015 – 30 April 2018Minister for Communications and InformationYaacob Ibrahim1 November 2012 – 30 April 2018Minister-in-charge of Muslim Affairs25 March 2002 – 30 April 2018Minister for DefenceNg Eng Hen21 May 2011 – 22 May 2025Minister for Foreign AffairsVivian Balakrishnan1 October 2015 – presentMinister for Home AffairsK. Shanmugam1 October 2015 – presentMinister for Law1 May 2008 – 22 May 2025Minister for HealthGan Kim Yong21 May 2011 – 14 May 2021Minister for Trade and Industry (Industry)S. Iswaran1 October 2015 – 30 April 2018Minister for FinanceHeng Swee Keat1 October 2015 – 14 May 2021Minister for Culture, Community and YouthGrace Fu1 October 2015 – 26 July 2020Minister in the Prime Minister's OfficeChan Chun Sing9 April 2015 – 30 April 2018Minister for Social and Family DevelopmentTan Chuan-Jin9 April 2015 – 10 September 2017Minister for National DevelopmentLawrence Wong1 October 2015 – 26 July 2020Second Minister for Finance22 August 2016 – 14 May 2021Minister for the Environment and Water ResourcesMasagos Zulkifli1 October 2015 – 26 July 2020Minister for Education (Schools)Ng Chee Meng1 November 2016 – 30 April 2018Second Minister for Transport1 November 2016 – 30 April 2018Minister for Education (Higher Education and Skills)Ong Ye Kung1 November 2016 – 30 April 2018Second Minister for Defence1 November 2016 – 30 April 2018Minister in the Prime Minister's OfficeJosephine Teo1 May 2017 – 30 April 2018Second Minister for Manpower1 May 2017 – 30 April 2018Second Minister for Foreign Affairs1 May 2017 – 10 September 2017Minister in the Prime Minister's OfficeDesmond Lee1 May 2017 – 10 September 2017Second Minister for Home Affairs1 May 2017 – 10 September 2017Second Minister for National Development1 May 2017 – 26 July 2020

September 2017 – April 2018 The cabinet consisted of the following members from 11 September 2017. PortfolioPortraitName TermPrime MinisterLee Hsien Loong12 August 2004 – 15 May 2024Deputy Prime MinisterTeo Chee Hean1 April 2009 – 30 April 2019Coordinating Minister for National Security21 May 2011 – 22 May 2025Deputy Prime MinisterTharman Shanmugaratnam21 May 2011 – 30 April 2019Coordinating Minister for Economic and Social Policies1 October 2015 – 30 April 2019Coordinating Minister for InfrastructureKhaw Boon Wan1 October 2015 – 26 July 2020Minister for Transport1 October 2015 – 26 July 2020Minister for Trade and Industry (Trade)Lim Hng Kiang1 October 2015 – 30 April 2018Minister for ManpowerLim Swee Say4 May 2015 – 30 April 2018Minister for Communications and InformationYaacob Ibrahim1 November 2012 – 30 April 2018Minister-in-charge of Muslim Affairs25 March 2002 – 30 April 2018Minister for DefenceNg Eng Hen21 May 2011 – 22 May 2025Minister for Foreign AffairsVivian Balakrishnan1 October 2015 – presentMinister for Home AffairsK. Shanmugam1 October 2015 – presentMinister for Law1 May 2008 – 22 May 2025Minister for HealthGan Kim Yong21 May 2011 – 14 May 2021Minister for Trade and Industry (Industry)S. Iswaran1 October 2015 – 30 April 2018Minister for FinanceHeng Swee Keat1 October 2015 – 14 May 2021Minister for Culture, Community and YouthGrace Fu1 October 2015 – 26 July 2020Minister in the Prime Minister's OfficeChan Chun Sing9 April 2015 – 30 April 2018Minister for National DevelopmentLawrence Wong1 October 2015 – 26 July 2020Second Minister for Finance22 August 2016 – 14 May 2021Minister for the Environment and Water ResourcesMasagos Zulkifli1 October 2015 – 26 July 2020Minister for Education (Schools)Ng Chee Meng1 November 2016 – 30 April 2018Second Minister for Transportation1 November 2016 – 30 April 2018Minister for Education (Higher Education and Skills)Ong Ye Kung1 November 2016 – 30 April 2018Second Minister for Defence1 November 2016 – 30 April 2018Minister in the Prime Minister's OfficeJosephine Teo1 May 2017 – 30 April 2018Second Minister for Home Affairs11 September 2017 – 22 May 2025Second Minister for Manpower1 May 2017 – 30 April 2018Minister for Social and Family DevelopmentDesmond Lee11 September 2017 – 26 July 2020Second Minister for National Development1 May 2017 – 26 July 2020

May 2018 – April 2019 The cabinet consisted of the following members from 1 May 2018. PortfolioPortraitName TermPrime MinisterLee Hsien Loong12 August 2004 – 15 May 2024Deputy Prime MinisterTeo Chee Hean1 April 2009 – 30 April 2019Coordinating Minister for National Security21 May 2011 – 22 May 2025Deputy Prime MinisterTharman Shanmugaratnam21 May 2011 – 30 April 2019Coordinating Minister for Economic and Social Policies1 October 2015 – 30 April 2019Coordinating Minister for InfrastructureKhaw Boon Wan1 October 2015 – 26 July 2020Minister for Transport1 October 2015 – 26 July 2020Minister for DefenceNg Eng Hen21 May 2011 – 22 May 2025Minister for Foreign AffairsVivian Balakrishnan1 October 2015 – presentMinister for Home AffairsK. Shanmugam1 October 2015 – presentMinister for Law1 May 2008 – 22 May 2025Minister for HealthGan Kim Yong21 May 2011 – 14 May 2021Minister for Communications and InformationS. Iswaran1 May 2018 – 14 May 2021Minister-in-charge of Trade Relations1 May 2018 – 18 January 2024Minister for FinanceHeng Swee Keat1 October 2015 – 14 May 2021Minister for Culture, Community and YouthGrace Fu1 October 2015 – 26 July 2020Minister for Trade and IndustryChan Chun Sing1 May 2018 – 14 May 2021Minister for National DevelopmentLawrence Wong1 October 2015 – 26 July 2020Second Minister for Finance22 August 2016 – 14 May 2021Minister for the Environment and Water ResourcesMasagos Zulkifli1 October 2015 – 26 July 2020Minister-in-charge of Muslim Affairs1 May 2018 – 22 May 2025Minister in the Prime Minister's OfficeNg Chee Meng1 May 2018 – 26 July 2020Minister for EducationOng Ye Kung1 May 2018 – 26 July 2020Minister for ManpowerJosephine Teo1 May 2018 – 14 May 2021Second Minister for Home Affairs11 September 2017 – 22 May 2025Minister for Social and Family DevelopmentDesmond Lee11 September 2017 – 26 July 2020Second Minister for National Development1 May 2017 – 26 July 2020Minister in the Prime Minister's OfficeIndranee Rajah1 May 2018 – presentSecond Minister for Law1 May 2018 – 30 June 2018Second Minister for Finance1 May 2018 – presentSecond Minister for Education1 May 2018 – 26 July 2020