Many rivers flow through the region, but the most important are the Niemen and Pregolya.

An excerpt from the article 24 facts about Kaliningrad

There are many lakes there, 38 of which have an area larger than 10 hectares.

The lowest place in the oblast are depressions - polders located in the northern part of the oblast, near the border with Lithuania, on the Curonian Lagoon, in the Slav region.

The highest hill is 242 m above sea level and is located less than a kilometer from the border with Poland (Szeskie Hills).