Eugene Tan Kheng Boon (born 18 February 1970) is a Singaporean academic who is currently an associate professor of law at the Singapore Management University. Tan served as a Nominated Member of Parliament between 2012 and 2014.
Tan started his career at the Ministry of Foreign Affairs (MFA) as a foreign service officer before going into academic teaching. His specialisation includes constitutional and administrative law, and policy of ethnic relations in Singapore.
Tan regularly writes for several media outlets in Singapore. He is also quoted regularly in all news sources within Singapore, and in major international press, particularly on matters related to domestic politics, constitutional law and elections.