Köllnischer Park is a public park located near the River Spree in Mitte, Berlin. It is named after Cölln, one of the two cities which came together to form Berlin; the park location was originally just outside it. Approximately 1 hectare in area, the park came into existence in the 18th and 19th centuries on the site of fortifications. It was redesigned as a public park in 1869–1873 and was further modified in the 20th century with the addition of first a bear enclosure, the Bärenzwinger, and later a permanent exhibition of sculpture, the Lapidary. The park is a registered Berlin landmark.

Cölln was the twin city of Old Berlin (Altberlin) from the 13th century to the 18th century. Cölln was located on the Fisher Island section of Spree Island, opposite Altberlin on the western bank of the River Spree, until the cities were merged by Frederick I of Prussia to form Berlin in 1710. Today, the former site of Cölln is the historic core of the modern Mitte locality of the Berlin-Mitte borough in central Berlin.