Colonel Robert David Percival-Maxwell DSO PC(Ire) (1870–?) was a British soldier and member of the Senate of Northern Ireland and Down County Council. Percival-Maxwell was educated at Eton College. He played a significant part in the raising of the 36th (Ulster) Division on the outbreak of the First World War. He was commissioned Major in the 13th (County Down) Battalion, Royal Irish Rifles, which he had raised, in September 1914 and was appointed second-in-command in December 1914. He was promoted to the temporary rank of Lieutenant-Colonel and commanded a battalion from November 1916 and commanded a battalion of the Royal Munster Fusiliers from May 1918. He was seriously wounded during the war. He resigned his commission in January 1919.