Leszno (Polish pronunciation: [ˈlɛʂnɔ] ; German: Lissa, [ˈlɪsa]) is a historic city in western Poland, seat of Leszno County within the Greater Poland Voivodeship. It is the seventh-largest city in the province with an estimated population of 62,200, as of 2021.
Leszno is a former residential city of prominent Polish magnate families of Leszczyński and Sułkowski, including King Stanisław Leszczyński, under whose patronage it flourished to become one of the major economic and cultural centers of Greater Poland, as reflected in the variety of landmarks, especially of the Baroque period.