The Polish 26th Infantry Division () was a unit of the Polish Army, which took part in the Polish September Campaign. It was formed as 4th Infantry Division (Poland) in southern Poland (former Austrian province of Galicia) in April 1919. Its regiments originally stationed in such towns as Cieszyn, Jarosław and Przemyśl. In 1921, the Division was renamed into 26th I.D. and it was moved north - to Skierniewice and vicinity. It consisted of these regiments: