Ralsko (German: Roll) is a town in Česká Lípa District in the Liberec Region of the Czech Republic.

Ralsko consists of nine municipal parts (in brackets population according to the 2021 census):[2] The town hall is located in Kuřívody.

The mountain was initially named Radlsko, meaning "belonging to a place called Rádlo".

The first written mention of Kuřívody is from 1279, it was founded between 1264 and 1278 by Ottokar II of Bohemia as a royal town.

[4] Between 1946 and 1950, the inhabitants were relocated to establish a military training area in surroundings of the Ralsko mountain.

After the collapse of the Soviet Union in 1990–91 the missiles were withdrawn and the entire weapons-testing area was closed off.

Many of the discarded Czech and Soviet munitions were collected and are now on display at a little museum in Kuřívody.