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.
| Portrait | width=150 rowspan=2 | Name | width=120 rowspan=2 | Position | Term of office | Notes | ||
|---|---|---|---|---|---|---|---|---|
| Took office | Left office | Time in office | ||||||
| Hans von Ramsay | Commander | May 1896 | 189? | |||||
| Heinrich Bethe | 1898 | February 1901 | years | |||||
| Portrait | width=150 rowspan=2 | Name | width=120 rowspan=2 | Position | Term of office | Notes | ||
|---|---|---|---|---|---|---|---|---|
| Took office | Left office | Time in office | ||||||
| Heinrich Bethe | Commander | 1899 | 1902 | years | ||||
| Friedrich Robert von Beringe | August 1902 | February 1904 | ||||||
| Werner von Grawert | February 1904 | June 1906 | ||||||
| Portrait | width=150 rowspan=2 | Name | width=120 rowspan=2 | Position | Term of office | Notes | ||
|---|---|---|---|---|---|---|---|---|
| Took office | Left office | Time in office | ||||||
| Werner von Grawert | Military Resident | 1906 | 15 November 1907 | years | ||||
On 15 November 1907, the Military Residency of Urundi and Ruanda was divided into two civil residencies: Ruanda and Urundi.
| Portrait | width=150 rowspan=2 | Name | width=120 rowspan=2 | Position | Term of office | Notes | ||
|---|---|---|---|---|---|---|---|---|
| Took office | Left office | Time in office | ||||||
| Philippe Molitor | Commander of the Northern Brigade | April 1916 | 1916 | years | ||||
| Armand Huyghé | 1916 | 1917 | years | |||||
| Portrait | width=150 rowspan=2 | Name | width=120 rowspan=2 | Position | Term of office | Notes | ||
|---|---|---|---|---|---|---|---|---|
| Took office | Left office | Time in office | ||||||
| Frederik-Valdemar Olsen | Commander of the Southern Brigade | May 1916 | 1917 | years | ||||
| Portrait | width=150 rowspan=2 | Name | width=120 rowspan=2 | Position | Term of office | Notes | ||
|---|---|---|---|---|---|---|---|---|
| Took office | Left office | Time in office | ||||||
| Charles Tombeur | Military Governor | April 1916 | 22 November 1916 | |||||
| Justin Malfeyt | Royal Commissioner | 22 November 1916 | May 1919 | |||||
| Alfred Marzorati | May 1919 | 20 October 1924 | ||||||
| Pierre Ryckmans | Acting Royal Commissioner | November 1921 | July 1922 | |||||
| Portrait | width=150 rowspan=2 | Name | width=120 rowspan=2 | Position | Term of office | Notes | ||
|---|---|---|---|---|---|---|---|---|
| Took office | Left office | Time in office | ||||||
| Alfred Marzorati | Royal Commissioner | 20 October 1924 | 28 August 1926 | |||||
| Pierre Ryckmans | Acting Royal Commissioner | 15 November 1925 | 13 December 1926 | |||||
| Alfred Marzorati | Governor and Deputy Governor-General of the Belgian Congo | 28 August 1926 | 5 February 1929 | |||||
| Louis Postiaux | Acting Governor and Deputy Governor-General of the Belgian Congo | 5 February 1929 | 4 July 1930 | |||||
| Charles Voisin | Governor and Deputy Governor-General of the Belgian Congo | 4 July 1930 | 18 August 1932 | |||||
| Eugène Jungers | 18 August 1932 | 5 July 1946 | ||||||
| Maurice Simon | 5 July 1946 | August 1949 | ||||||
| Léo Pétillon | August 1949 | 1 January 1952 | ||||||
| Alfred Claeys-Boùùaert | 1 January 1952 | 1 March 1955 | ||||||
| Jean-Paul Harroy | 1 March 1955 | 1960 | ||||||
| Resident-General | 1960 | 1 July 1962 | ||||||
On 1 July 1962, the constituent parts of Ruanda-Urundi became independent as the Republic of Rwanda (République du Rwanda) and the Kingdom of Burundi (Royaume du Burundi), respectively.