Tony Tan Lay Thiam (Chinese: 陈礼添; pinyin: Chén Lǐtiān; born 1970) is a Singaporean politician and businessman.

After completing his degree, Tan served in the Singapore Army and was promoted to the rank of Major when he was 27.

During his service, he was named the Top Student for the Basic Army Intelligence Course, Company Tactics Course and Combat Engineer Advanced Officer Course.

[4] In the 2011 general election, Tan and Poa were members of the party's five-person team which stood in the Chua Chu Kang Group Representation Constituency.

As a husband and wife pair of former government scholars standing for an opposition party, Tan and Poa drew notable media attention during the election campaign.