South Korea maintains diplomatic relations with 191 countries. The country has also been a member of the United Nations since 1991, when it became a member state at the same time as North Korea. South Korea has also hosted major international events such as the 1988 Summer Olympics and 2002 World Cup Football Tournament and the 2011 IAAF World Championships Daegu South Korea. Furthermore, South Korea had hosted the 2018 Winter Olympics which took place in Pyeongchang from 9 to 25 February.

Ban Ki-moon is a South Korean politician and diplomat who served as the eighth secretary-general of the United Nations between 2007 and 2016. Prior to his appointment as secretary-general, Ban was the South Korean Minister of Foreign Affairs and Trade between 2004 and 2006. Ban was initially considered to be a long shot for the office of Secretary-General of the United Nations; he began to campaign for the office in February 2006. As the foreign minister of South Korea, he was able to travel to all the countries on the United Nations Security Council, a manoeuvre that subsequently turned him into the campaign's front-runner.