Jaworzno ja'wożno is a city in southern Poland, near Katowice. It lies in the Silesian Highlands, on the Przemsza river (a tributary of the Vistula). Jaworzno belongs to Lesser Poland and despite of belonging to Silesian Voivodeship since 1999, Jaworzno is not part of Silesia. The city is situated in the Silesian Voivodeship since its formation in 1999, previously (1975–1999) it was in Katowice Voivodeship. Jaworzno is one of the cities of the 2,7 million conurbation – Katowice urban area and within a greater Silesian metropolitan area populated by about 5,294,000 people. The population of the city is 89,350 (2021).
The municipality is situated a short distance to the north-east of Junction 41 on the A4 Highway. It lies in the Silesian Highlands, in the historical region of Lesser Poland, and since its foundation until 1975, it was administratively tied with Lesser Poland's capital, Kraków. Until 1795, it belonged to Kraków Voivodeship, then, together with Kraków, was seized by the Habsburg Empire in the Partitions of Poland. In 1815–1846 it belonged to the Free City of Kraków, which was annexed by Austria and merged with Kingdom of Galicia and Lodomeria. In 1918 Jaworzno returned to Poland. The name of the city comes from the jawor trees (sycamore maple), which in the past were abundant in this area.
Jaworzno was placed into the Silesian Voivodeship (province) effective January 1, 1999 under the Local Government Reorganization Act. Previously, it was attached to the Katowice Voivodeship (1975–1998) and before that to the Kraków Voivodeship. Jaworzno lies in the east of the largest metropolis in Poland and one of the largest in the European Union, numbering about 3,5 million. This urban expansion bloomed in the 19th century thanks to the rapid development of mining and metallurgical industries. In 2006 Jaworzno and 14 neighboring cities formed a multimunicipal structure, the Upper Silesian Metropolitan Union. Its population is 2 million and its area is .
The climate of the area is continental humid.