Neuhardenberg is a municipality located in the Märkisch-Oderland district within the state of Brandenburg in north-eastern Germany. It serves as a constituent part of the Amt Seelow-Land.
The town is notable for being the site of Neuhardenberg Palace, which served as the residence of the Prussian statesman Prince Karl August von Hardenberg (1750–1822). The municipal area also encompasses the villages of Altfriedland, Quappendorf, and Wulkow.