[2] The uplands are thus a transition between lowland areas in the south (Lower Ohře Table, Jizera Table) and between mountain ranges in the north (Lusatian Mountains, Central Bohemian Uplands, Ještěd–Kozákov Ridge).

The highest peaks of the Ralsko Uplands are: The territory has a relatively regular shape and stretches from southwest to northeast.

The region has an area of 1,356 square kilometres (524 sq mi) and an average elevation of 318 m (1,043 ft).

The most populated settlements located in whole or in large part in the territory are Česká Lípa, Nový Bor, Mimoň, Doksy and Stráž pod Ralskem.

In the north, the Lužické hory and České středohoří protected landscape areas extend into the territory.