Lieutenant-General baron Louis Ruquoy (or Louis Rucquoy) (French pronunciation: [lwi ʁykwa]; 3 November 1861 – 1937) was the Chief of Staff of the Belgian Army during the second part of the First World War.

By 1914 he was Lieutenant-Colonel and commander of the 3rd Regiment of chasseurs à pied.

On 30 March 1916 he became Lieutenant-General and in January 1917 he succeeded Felix Wielemans as Chief of the General Staff.

He ended the war as commander of the Belgian occupation forces in the Rhineland.

His only son, Pierre, was killed in the trenches near Boezinge on 26 December 1916.