| Chung Doo-un | |
| Office: | Member of the National Assembly |
| Term Start: | 2004 |
| Term End: | 2016 |
| Predecessor: | Jang Se-sik |
| Successor: | Kim Young-ho |
| Constituency: | Seodaemun-eul |
| Office1: | Vice Mayor of Seoul |
| Term Start1: | 2000 |
| Term End1: | 2003 |
| Native Name Lang: | ko |
| Birth Date: | 1957 3, df=y |
| Birth Place: | Hongeun-dong, Seodaemun-gu, Seoul, South Korea |
| Death Place: | Seoul, South Korea |
| Party: | Grand National Party |
| Education: | Seoul National University Georgetown University Kookmin University |
| Website: | Official Website |
| Width: | 130px |
| Hangul: | 정두언 |
| Rr: | Jeong Dueon |
| Mr: | Chŏng Duŏn |
Chung Doo-un (6 March 1957 – 16 July 2019) was a South Korean politician who was Vice-Mayor of Seoul from 2000 to 2003.
Chung, along with Chu ho-young and Park Heong-joon, was a close associate of President Lee Myung-bak but later became critical of him and the leadership of the Grand National Party after Lee's election.[1] On 26 August 2011, he described Lee Myung-bak's fair society governance as a failure due to the prime minister-led surveillance against civilians in 2010.[2]
The Minjoo Party's Kim Young-ho took his seat in the National Assembly at the 20th general election, held on 13 April 2016.[3]
Chung committed suicide, aged 62, in a park in Seoul on 16 July 2019.[4]