List of colonial governors of Ruanda-Urundi
This is a list of European colonial administrators responsible for the territory of Ruanda-Urundi, an area equivalent to modern-day Rwanda and Burundi. Ruanda-Urundi formed part of German East Africa until it was captured by Belgian forces during World War I. After that, the territory became a Class B League of Nations mandate, and later a United Nations trust territory, under the administration of Belgium, until 1962 when the constituent parts of the territory became independent.
German rule
Military District of Ujiji
| Tenure | Incumbent | Notes |
| 1896 to 189? | Hans von Ramsay, Commander | |
| 1898 to 1901 | Heinrich von Bethe, Commander |
Military District of Usumbura
Belgian rule
Territories south of Lake Victoria (including Northern Ruanda)
| Tenure | Incumbent | Notes |
| May 1916 to 1916 | Philippe Molitor, Commander of the Northern Brigade | |
| 1916 to 1917 | Armand Huyghé, Commander of the Northern Brigade |
Territories east of Lake Kivu and Lake Tanganyika (including Southern Ruanda and Urundi)
| Tenure | Incumbent | Notes |
| June 1916 to 1917 | Frederik-Valdemar Olsen, Commander of the Southern Brigade |
Belgian-occupied East African territories
| Tenure | Incumbent | Notes |
| 1916 to 22 November 1916 | Charles Tombeur, Military Governor | |
| 22 November 1916 to May 1919 | Justin Malfeyt, Royal Commissioner for Occupied East Africa | |
| May 1919 to 20 October 1924 | Alfred Marzorati, Royal Commissioner for Occupied East Africa | |
| November 1921 to July 1922 | Pierre Ryckmans, acting Royal Commissioner for Occupied East Africa |