Yoon Si-Ho (Hangul: 윤시호; born 12 May 1984) is a South Korean footballer who plays as full back. He was named Yoon Hong-Chang (Hangul: 윤홍창, Hanja: 尹洪唱) but was later renamed Yoon Si-Ho.
On 25 February 2011, Yoon moved to Daegu FC. Yoon made his Daegu FC debut on 5 March against Gwangju FC at Gwangju World Cup Stadium in a 2–3 loss. After a one-year stint with Daegu, he returned to FC Seoul.