Brigadier General Sir Walter Ramsay McNicoll, KBE, CB, CMG, DSO, VD (27 May 1877 – 24 December 1947) was an Australian teacher, soldier, and colonial administrator.

[1] As a lieutenant colonel, McNicoll commanded the 6th Battalion, 2nd Australian Brigade, at Gallipoli and was seriously wounded during an infantry charge in the Second Battle of Krithia on 8 May 1915.

Bean piled discarded packs around McNicoll as protection against the still-continuing small arms fire and returned in the night with a stretcher party.

From December 1916 to the armistice nearly two years later, the brigade was part of numerous actions on the Western Front, including Messines, Ypres, the Somme, and Amiens.

The manifold responsibilities of the Administrator ranged from education and justice to defence, with often conflicting advice or direction coming from the Permanent Mandates Commission and the Australian government, and pressures from the various religious missions, as well as commercial mining and plantation interests—the latter being almost the sole source of the Territory's revenues.

Ronald and Alan both attained senior positions in the Australian military—becoming a major general and vice admiral respectively—while David was a well-known Sydney-based journalist.