Janské Lázně (Czech pronunciation: [ˈjanskɛː ˈlaːzɲɛ]; German: Johannisbad) is a small spa town in the Hradec Králové Region of the Czech Republic. It has around 850 inhabitants. It is located in mountainuous area 519 meters (1,703 feet) above sea level.
Local thermal spring was used as early as in the 15th century. During 1675 - 1680 a village was founded here by order of Johann Adolf, prince of Schwarzenberg. In 1881 it obtained township privileges.
The water bath runs at a natural temperature of 29.6 °C (85.3 °F). Besides the bath observation tower, another popular tourist attraction is a Neo-Renaissance colonnade.
The place is also known among winter sports athletes, including being host of the 1925 FIS Nordic World Ski Championships and 1937 Workers' Winter Olympiad.