Nogometni klub Celje, commonly referred to as NK Celje or simply Celje, is an association football club from Celje, Slovenia. They play in the Slovenian PrvaLiga. Together with Maribor, they are the only club that have participated in every season of the Slovenian PrvaLiga since its formation in 1991. Celje won their first league title in the 2019–20 season. They have also won the 2004–05 edition of the Slovenian Cup.