Polish Legion in Finland (Legjon Polski w Finlandji) was a military unit comprising ethnic Poles who had been soldiers of the Russian Imperial Army in World War I. Created on April 24, 1917, in Viipuri, it existed until March 1, 1918. It comprised infantry battalion in Viipuri and infantry company in Ino and heavy artillery battery in Sveaborg. At its peak, the Legion comprised 37 officers, 1,700 soldiers and was commanded by Captain Stanislaw Boguslawski.