| Cheng Yu-cheng | |
| Native Name Lang: | zh-tw |
| Honorific-Suffix: | MLY |
| Order: | Member of the Legislative Yuan |
| Constituency: | Taipei County 2 |
| Term Start: | 1 February 2002 |
| Term End: | 31 January 2005 |
| Term Start1: | 1 February 1990 |
| Term End1: | 31 January 1993 |
| Term Start2: | 1 February 1981 |
| Term End2: | 31 January 1987 |
| Birth Date: | 1946 1, df=yes |
| Birth Place: | Xinzhuang, Taipei County, Taiwan |
| Nationality: | Taiwanese |
| Alma Mater: | National Taipei University of Technology |
| Occupation: | politician |
Cheng Yu-cheng (; born 12 January 1946) is a Taiwanese politician.
Cheng studied at the National Taipei University of Technology.[1]
Cheng was raised in what became Xinzhuang District of New Taipei. He began his political career as leader of the area in 1977, before taking a seat on the Legislative Yuan in 1981. He won a second term in 1983, but lost the 1986 elections. Shortly thereafter, Cheng joined the Democratic Progressive Party. He returned to the legislature in 1990 as a DPP representative. Cheng subsequently lost a string of elections until regaining his seat in 2001.[2] In August 2002, Cheng flew to the United States, after he and his legislative aide Sophie Wang had reportedly married in July.[3] He retained former legislative colleague Chiu Chang as his legal representative while seeking a divorce from his wife Lu Pei-ying.[4] However, the divorce was never finalized.[5] Cheng kept his position as a legislator,[6] but left the Democratic Progressive Party in November 2002,[7] days before he was formally expelled.[8] Cheng then became an independent before joining the Non-Partisan Solidarity Union upon its founding in June 2004.[9] [10]