8th Legions Infantry Regiment (Polish: 8 Pulk Piechoty Legionow, 8 pp Leg.) was an infantry regiment of the Polish Army. It existed from 1918 until 1939. Garrisoned in Lublin, and belonged to the 3rd Legions Infantry Division from Zamość. The regiment traced its traditions back to the 8th Infantry Regiment of the Duchy of Warsaw, commanded by Colonel Cyprian Godebski.
The history of the 8th Legions Infantry Regiment dates back to May 1918, when 2nd Infantry Regiment was formed in Ostrów Mazowiecka, by Polska Siła Zbrojna. In early 1919, during the Polish–Ukrainian War, it was renamed as the 8th Legions Infantry Regiment, and kept this name until the dissolution of Poland in October 1939. During the Nazi-Soviet Invasion of Poland, the regiment, together with whole 3rd Legions Infantry Division, which belonged to Prusy Army, fought in several major battles of the war.
The 2nd Infantry Regiment was officially formed by Polska Siła Zbrojna on May 15, 1918. On November 1, its three battalions were sent to Kraków, Lublin and Warsaw, where it guarded the Warsaw Citadel.
In late 1918, the regiment, commanded by Ferdynand Zarzycki, was sent to eastern part of former Austrian Galicia, to fight against the Ukrainians. On January 16, 1919, its name was changed into the 8th Legions Infantry Regiment, and the unit was garrisoned in Lublin.
The regiment fought in Eastern Galicia and Volhynia from December 1918 until June 1919, suffering heavy losses. Among others, it clashed with the Ukrainians at Rawa Ruska (January 3, 1919), Zolkiew (March 9, 1919), Magierów, Sknilow, Niemirow (March 12, 1919) and Belz.