Barnim (German pronunciation: [ˈbaʁnɪm] ⓘ) is a district in Brandenburg, Germany.

The name "Barnim" emerged in the 13th century and was applied to a large forest region east of the Havel and north of the Spree on the homonymous plateau, where noblemen used to hunt.

The present district is roughly identical with, but somewhat smaller than this historical region.

This is a forest region with several large lakes, e.g. Werbellinsee (8 km2), Grimnitzsee (8 km2) and Parsteiner See (10 km2).

The Schorfheide is a UNESCO Biosphere Reserve and houses several rare animals like the white-tailed eagle, greater spotted eagle, osprey, black stork, European beaver and Eurasian otter.