Cheng Yung-chin (Chinese: 鄭永金; pinyin: Zhèng Yǒngjīn; Wade–Giles: Chêng4 Yung3-chin1; born 8 October 1949) is a Taiwanese politician.

Shortly after the 1999 Jiji earthquake, Cheng supported the visit of Trinley Thaye Dorje, a Tibetan Buddhist leader, to Taiwan.

[10] In August 2006, the Hsinchu District Prosecutor's Office indicted Cheng on charges of bribery and corruption.

[12] Cheng supported Chang Pi-chin, a former KMT member running an independent campaign for Hsinchu County Magistrate, in 2009.

[2][14] Cheng declared his independent candidacy for the 2014 Hsinchu County magistracy election, but lost despite the support of former rival Lin Kuang-hua and the Democratic Progressive Party.