Tychy is a city located in the Silesia region of southern Poland. It is situated approximately 20 kilometres (12 mi) south of Katowice and lies on the southern edge of the Upper Silesian industrial district.
The city borders Katowice to the north, Mikołów to the west, Bieruń to the east, and Kobiór to the south. The Gostynia river, which is a tributary of the Vistula, flows through the city.