The IV Cavalry Brigade (Polish IV Brygada Kawalerii) was a unit of the Polish Army during the Polish-Bolshevik War and later in the inter-war period. It was commanded by major Feliks Jaworski and then by colonel Adam Nieniewski. After the battle, the brigade was attached to the assault group of Rydz-Śmigły's 2nd Army and took part in the Battle of the Niemen. It also formed the core of the Polish areas defending Suwałki during the Polish-Lithuanian War.