Tan Kok Yew (simplified Chinese: 陈国耀; traditional Chinese: 陳國耀; pinyin: Chén Guóyào ; born 27 April 1967) is a Malaysian politician who served as Member of the Kedah State Executive Council (EXCO) in the Pakatan Harapan (PH) state administration under former Menteri Besar Mukhriz Mahathir from May 2018 to the collapse of the PH state administration in May 2020 and Member of the Kedah State Legislative Assembly (MLA) for Derga from May 2013 to August 2023. He is a member and State Chairman of Kedah of the Democratic Action Party (DAP), a component party of the PH coalition. He was also the only DAP candidate to lose in the 2023 state elections.