| Secretary-General | Nationality | Dates in Office |
|---|---|---|
| Trygve Halvdan Lie | Norwegian | 1946-53 |
| Dag Hammarskjöld | Swedish | 1953-61 |
| U Thant | Burmese | 1962-71 |
| Kurt Waldheim | Austrian | 1972-81 |
| Javier Pérez de Cuéllar | Peruvian | 1982-91 |
| Boutros Boutros-Ghali | Egyptian | 1992-96 |
| Kofi Annan | Ghanaian | 1997-2006 |
| Ban Ki-Moon | South Korean | 2007- |