Yun Byung-se (; born 3 August 1953) was the Foreign Affairs Minister of South Korea. His term ended 31 May 2017. From 2006 to 2008, Yun served as senior presidential secretary for foreign, security and unification policy.
Yun joined the Ministry of Foreign Affairs in 1977. Since 1984, he has worked in Sydney, New York, the United Nations, Singapore, and Geneva. He served as vice foreign minister in 2004.
He was foreign minister from 2013 to 2017.
Yun Byung-se visited Iran in 2015 and met with the country's Foreign Minister Mohammad Javad Zarif and the president.