Rybnik is a city in southern Poland, in the Silesian Voivodeship, around 38 km (24 mi) southwest of Katowice, the region's capital, and around 19 km from the Czech border. It is one of the major cities of the Upper Silesian-Moravian metropolitan area with a population of 5.3 million and the main city of the so-called Subregion Zachodni, previously also known as the Rybnik Coal Area. With a population of 135,994 as of January 1, 2022, it is the 25th most-populous city in Poland.

Silesian Voivodeship is a voivodeship, or province, in southern Poland centered on the historic region known as Upper Silesia, with Katowice serving as its capital.