Laško (; ) is a spa town in eastern Slovenia. It is the seat of the Municipality of Laško. Traditionally the area was part of the Styria region. The municipality is now included in the Savinja Statistical Region. The town is located at the foothills of Hum Hill on the Savinja River. It was first mentioned in written documents dating to 1227 and was granted town privileges in 1927. It is known to have been settled since the Iron Age and Roman archaeological finds are common in the area, though the precise location of the Roman settlement is not known. Today the town is best known for its annual Festival of Beer & Flowers (Pivo - Cvetje) and the local Laško Brewery, the largest brewery in the country. In 2010, Laško was heavily affected by flooding.