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Koleje Śląskie (Polish for Silesian Railways; KŚ) is a regional rail operator in the Silesian Voivodeship of Poland.
The company was founded in 2010 and is fully owned by the local government. It started servicing in October 2011.
In 2020 it was the second largest single-voivodeship regional rail provider, having transported 6.21% of all rail passengers in Poland.
Koleje Śląskie as of 2023 operates 17 ordinary and excursion routes, spanning around 1100 kilometers in total