Leong Mun Wai (Chinese: 梁文辉; pinyin: Liáng Wénhuī; born 25 September 1959[1]) is a Singaporean politician and former investment banker.

An Overseas Merit Scholar and Sloan Fellow, Leong worked at the Government of Singapore Investment Corporation (GIC) and Merrill Lynch, before joining OCBC Securities, and later DBS Vickers, as managing director.

[29] In 2023, MP for Bukit Batok SMC Murali Pillai claimed in Parliament that Leong had “advocated some form of rent control” during a debate on the Significant Investments Review Bill.

[31] The same year, Leong's motion on housing policy was supported by all 11 opposition Members of Parliament, but failed to win the majority PAP's vote.

[32] Eugene Tan, an associate professor at Singapore Management University, has described Leong as having a "dogged but confrontational style" in Parliament with a "folksy persona" that attempts to embody a "defiant underdog speaking for the masses".

Felix Tan, a lecturer at Nanyang Technological University, notes that "A vocal articulation of [Leong's] thoughts in parliament has given him... perhaps an increasing number of supporters for the way that he goes about voicing concerns amongst certain groups of Singaporeans.

"[33] Leong argues that Singaporeans at large are worried about domestic jobs being replaced by expatriates, advocating for laws that prevent discrimination on the basis of nationality.

[35][36] In 2021, Leong criticised the government for the India–Singapore Comprehensive Economic Cooperation Agreement, claiming that the policy had negatively affected Singaporean employment whilst increasing immigration into Singapore.

[45][46] He opposed the government's passing of the Foreign Interference (Countermeasures) Act, arguing that more public consultation and legislative checks should have been put into place.

During that debate, Leong acknowledged the complexity of the Israeli-Palestinian conflict and called for greater public education on this issue to reduce the risk of Singaporeans being swayed by biased or incorrect discourse.