| Yoon Jeung-hyun | |
| Native Name Lang: | ko |
| Office1: | 2nd Minister of Strategy and Finance |
| President1: | Lee Myung-bak |
| Term Start1: | 10 February 2009 |
| Term End1: | 1 June 2011 |
| Predecessor1: | Kang Man-soo |
| Successor1: | Bahk Jae-wan |
| Birth Date: | 19 September 1946 |
| Birth Place: | Masan, Korea (now Changwon, South Korea) |
| Alma Mater: | Seoul National University |
| Korean name | |
| Hangul: | 윤증현 |
| Rr: | Yun Jeung-hyeon |
| Mr: | Yun Chŭnghyŏn |
| Headercolor: | lavender |
Yoon Jeung-hyun (born September 19, 1946) is a South Korean civil servant and politician, who served as acting Prime Minister of South Korea from August to October, 2010.
He was born in Masan, and graduated from Seoul National University. He became the Minister of Strategy and Finance on February 10, 2009.