Basketball Club ŽALGIRIS (Lithuanian: Krepšinio klubas "ŽALGIRIS") commonly known as BC "ŽALGIRIS", is a professional basketball club based in Kaunas, Lithuania. They compete domestically in the Lithuanian Basketball League (Lietuvos krepšinio lyga) and internationally as a long-term licensed EuroLeague team. Since the 2011–12 season, Žalgiris has played its home games in ŽALGIRIS Arena (capacity 15,415) Kaunas.
The club's name commemorates the Polish–Lithuanian–Teutonic War's Battle of ŽALGIRIS, also known as the Battle of Grunwald, in which the joint forces of the Grand Duchy of Lithuania and Kingdom of Poland defeated the Teutonic Order in one of medieval Europe's largest battles. ŽALGIRIS and Grunwald translate to "green wood" in Lithuanian and German languages.