Colonel Edmund Gilling Watts Hallewell (April 1822 – 1869) was a British Army officer who became Commandant of the Royal Military College, Sandhurst.

He married Sophia, the daughter of General Sir William Reid.

[1] Educated at Rugby School,[2] Hallewell was commissioned as an ensign in the 28th Regiment of Foot on 31 December 1839.

[3] He became Deputy Assistant Quartermaster-General to the Light Division and fought at the Battle of Alma in September 1854, the Battle of Inkermann in November 1854 and at the siege of Sebastopol in Winter 1854 during the Crimean War.

[3] He was awarded the French Legion of Honour (Chevalier), the Ottoman Order of the Medjidie, 5th Class and the Sardinian Silver Medal of Military Valor.