| Leonard Fielding Nalder | |
| Office1: | Governor of Fung Province |
| Term Start1: | 1927 |
| Term End1: | 1930 |
| Office2: | Governor of Mongalla Province |
| Term Start2: | 5 December 1930 |
| Term End2: | 1936 |
| Predecessor2: | Francis Balfour |
| Birth Date: | 1888 |
| Birth Place: | Alexandria, Ottoman Empire (present-day Egypt) |
| Death Date: | 1958 |
Leonard Fielding Nalder (1888–1958) was a British colonial administrator who was Governor in turn of Fung Province (1927–1930) and Mongalla province (1930–1936) in the Anglo-Egyptian Sudan.
Fielding was born in 1888 and educated at Rugby School and Corpus Christi College, Oxford. He joined the Sudan Political Service and was posted to Khartoum in 1912, then to the Red Sea Province from 1913 to 1917. He was temporarily transferred to serve in Mesopotamia and Iraq between 1917 and 1922. Between 1923 and 1926 he served in Kordofan and Khartoum. In 1927 he was a member of the Turko-Iraq Frontier Delimitation Commission. In 1927 he was appointed Governor of Fung Province, and in 1930 Governor of Mongalla province, serving in this position until his retirement in 1936.[1]