Chorzów ; Silesian: Chorzůw) is a city in Silesia in southern Poland, near Katowice. Chorzów is one of the central districts of the Upper Silesian Metropolitan Union - a metropolis with a population of 2 million. It is located in the Silesian Highlands, on the Rawa River (a tributary of the Vistula). Administratively, Chorzów is in the Silesian Voivodeship since 1999, previously Katowice Voivodeship, and before then, the Silesian Voivodeship. Chorzów is one of the cities of the 2.7 million conurbation - the Katowice urban area and within a greater Silesian metropolitan area with the population of about 5,294,000 people. The population within the city limits is 113,162 (June 2009).