Louis Marie Koeltz (Besançon, 30 September 1884 – Paris, 27 May 1970) was a French Lieutenant General in World War II.
Of Alsatian origin, Koeltz was born in Besançon, as his father, a brigadier in the gendarmerie, chose to leave Alsace-Lorraine which had become controlled by the Germans in 1871.
At the outbreak of World War II, he was Vice Chief of Operations at the Grand Quartier Général.
He then participated with his Corps against the Germans and Italians in the Tunisian campaign, taking 31,000 prisoners in May 1943.
After the war, he was a government representative for France in the Allied Control Council (1945–1946) in occupied post-war Germany.