Leonard Fielding Nalder CMG CIE CBE (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.
In 1927 he was a member of the Turko-Iraq Frontier Delimitation Commission.