Explanation
António Guterres elect second time as UNSG List of Secretary-General of United Nation No Secretary-General Country Duration Total Duration acting Gladwyn Jebb 101 days 1 Trygve Lie Norway Feb. 1, 1946–April 10, 1953 6 years, 282 days 2 Dag Hammarskjöld Sweden April 10, 1953–Sept. 18, 1961 8 years, 161 days 3 U Thant Myanmar (Burma) Nov. 30, 1962–Dec. 31, 1971 10 years, 31 days 4 Kurt Waldheim Austria Jan. 1, 1972–Dec. 31, 1981 10 years 5 Javier Pérez de Cuéllar Peru Jan. 1, 1982–Dec. 31, 1991 10 years 6 Boutros Boutros-Ghali Egypt Jan. 1, 1992–Dec. 31, 1996 5 years 7 Kofi Annan Ghana Jan. 1, 1997–Dec. 31, 2006 10 years 8 Ban Ki-moon South Korea Jan. 1, 2007–Dec. 31, 2016 10 years 9 António Guterres Portugal Jan. 1, 2017– Ongoing.
