Leonid Vilgelmovich Lesh (Russian, Леонид Вильгельмович Леш, January 9, 1862 – August 28, 1934) was an Imperial Russian army commander. He served in China and fought in the war against the Empire of Japan. Lesh took over command of the Third Army during the Gorlice–Tarnów offensive. After the October Revolution of 1917, he fought against the Bolsheviks. With the defeat of the White Army in the civil war, he emigrated to Yugoslavia. He died in what is now Croatia.