Wrocławski Klub Sportowy Śląsk Wrocław Spółka Akcyjna, commonly known as Śląsk Wrocław or simply Śląsk, is a Polish football club based in Wrocław that plays in Ekstraklasa, the highest level of the Polish football league system. The club was founded in 1947 and has competed under many names since then; adopting the name Śląsk Wrocław ten years after their foundation. In 1977, Śląsk Wrocław won the Polish league championship for the first time. The club has also won the Polish Cup twice, the Polish Super Cup twice and the Ekstraklasa Cup once. The club's home is Wrocław Stadium, a 42,771 capacity stadium in Wrocław which was one of the host venues during UEFA Euro 2012. The club previously played at Olympic Stadium and Stadion Oporowska.

Poland Ekstraklasa, meaning "Extra Class" in Polish, named PKO Bank Polski Ekstraklasa since the 2019–20 season due to its sponsorship by PKO Bank Polski, is the top Polish professional league for men's association football teams.