Third Silesian Uhlan Regiment (Polish language: 3 Pulk Ulanów Slaskich, 3 pul) was a cavalry regiment of the Polish Army in the Second Polish Republic and armoured regiment of the Polish Armed Forces in the West. Its traditions dated back to the 3rd Uhlan Regiment of the Duchy of Warsaw.
The Third Uhlan Regiment was formed in November 1917, as part of Polish I Corps in Russia. It existed only until July 1918, and consisted of elements of several other ethnic Polish units.
On October 13, 1918, in Warsaw, Colonel Stefan Strzemieński began forming a new uhlan regiment. Its squadrons were located both in Warsaw and Zagłębie Dąbrowskie, taking part in disarming of demoralized German soldiers of the Ober Ost. In January 1919, two squadrons were sent to eastern part of former Austrian Galicia, to fight in the Polish–Ukrainian War. In April 1919, whole regiment fought in Polesie and around Minsk, remaining in Belarus until May 1920.
As part of Edward Rydz-Śmigły's Third Army, the regiment fought in Kiev Offensive (1920). It protected Polish rear during the retreat of early summer 1920, and then fought against the Soviets in the bloody Battle of Cycow. In this battle, together with 7th Lublin Uhlan Regiment, it formed 4th Cavalry Brigade. After the battle, the regiment chased the enemy towards Białystok and Augustów, where it clashed with Lithuanian troops, advancing southwards. It then fought in the Battle of the Niemen River, remaining along Polish–Soviet demarcation line until mid-1921.