Peter Ng Kok Song (Chinese: 黄国松; pinyin: Huáng Guó Sōng; Pe̍h-ōe-jī: N̂g Kok-sông; Teochew pronunciation [ŋ˥˥ kok̚˨ soŋ˥˥]; born 11 February 1948), better known as Ng Kok Song, is a Singaporean financier, fund manager and entrepreneur who served as the chief investment officer of GIC between 2007 and 2013, and director of the Monetary Authority of Singapore between 1985 and 1986. He is also the founder of asset management company Avanda Investment Management.

Ng was the founding chairman of the Singapore International Monetary Exchange (SIMEX), the predecessor to SGX Group. He also served as a board member of SGX Group between 2013 and 2018, and Temasek Holdings between 2003 and 2005.

In 2023, Ng announced a run for the Singaporean presidential election that year. He received a Certificate of Eligibility by the Presidential Elections Committee and was successfully nominated as one of three candidates.[1] He won 15.72% of the votes, edging out Tan Kin Lian with 13.87%, but ultimately losing to Tharman Shanmugaratnam, who won 70.41% of the vote.