Kenneth Tiong Boon Kiat (born 1989) is a Singaporean politician and businessman. A member of the Workers' Party (WP), Tiong has been the Member of Parliament (MP) for the Serangoon division of Aljunied Group Representation Constituency (GRC) since 2025.
Tiong attended Raffles Institution and Raffles Junior College. In 2014, he graduated from Brown University with a Bachelor of Science in Applied Mathematics-Computer Science and Philosophy.
Tiong worked at McKinsey & Company from 2014 to 2016 as a business analyst, and at Millennium Management from 2016 to 2018 as a quantitative analyst. He later became head quant developer and portfolio manager at Brahman Capital and worked there until 2022.
In 2022, Tiong co-founded a technology startup and served as its chief technology officer until 2023. Since 2023, he has been the director of Sensemake.ai, a news intelligence platform.
Tiong first volunteered with the WP in 2023, contributing to its policy team and assisting party activities in East Coast GRC and Aljunied GRC. He joined the party in late 2023. In May 2024, he became the legislative assistant of Leader of the Opposition Pritam Singh, and, in January 2025, the party's coordinator for activities in the Serangoon division of Aljunied GRC. In April 2025, he was spotted at an Aljunied GRC event, causing speculation that he would run in the 2025 general election. On Nomination Day, 23 April, Tiong was officially announced as a WP candidate for Aljunied GRC.
During the 2025 general election, Tiong was in a five-member WP team and contested in Aljunied GRC with Pritam Singh, Sylvia Lim, Gerald Giam and Fadli Fawzi and won the GRC with 59.71% of the votes. Tiong was elected as Member of Parliament representing Aljunied GRC in the 15th Parliament.
In June 2025, Tiong was co-opted to the WP's Central Executive Committee (CEC) as the party's deputy treasurer.
Tiong is married with two children.