Sam Tan Chin Siong (Chinese: 陈振泉; pinyin: Chén Zhènquán, born 13 October 1958) is a Singaporean former politician. A member of the governing People's Action Party, he was the Member of Parliament (MP) representing the Radin Mas division of Tanjong Pagar GRC between 2006 and 2011 and Radin Mas SMC between 2011 and 2020.