11th Legions Infantry Regiment of Marshal Edward Śmigły-Rydz (Polish: 11 Pułk Ułanów Legionowych im. Marszałka Edwarda Śmigłego-Rydza, 11 puł) was a cavalry unit of the Polish Army, which existed in 1918–1939. It fought in the Polish–Soviet War and the Invasion of Poland. In the Second Polish Republic, the regiment was garrisoned in Ciechanów, and in 1939, belonged to Mazowiecka Cavalry Brigade.