Nienhagen

Nienhagen may refer to the following places in Germany:


 * Nienhagen, Mecklenburg-Vorpommern, in the district of Bad Doberan, Mecklenburg-Vorpommern (also home of Nienhagen Wood)
 * Nienhagen, Lower Saxony, in the district of Celle, Lower Saxony
 * Nienhagen, Saxony-Anhalt, in the district of Harz, Saxony-Anhalt
 * , a part of Staufenberg, Lower Saxony
 * Detmold-Nienhagen, a part of Detmold, North Rhine-Westphalia