The Birnbaumteich is a reservoir in the German state of Saxony-Anhalt, located near Neudorf in the Harz mountains.

In 1963 the dam had to be repaired because its penstock had collapsed.

There are bathing areas, a campsite and the Birnbaumteich Holiday Park (Ferienpark Birnbaumteich) by the reservoir.

The barrier of the Birnbaumteich is an earth-fill dam with an impervious core.

The spillway on the right abutment consists of a pipe culvert with a diameter of 1 m. The headwater stream is known as the Birnbaumgraben or Bach vom Birnbaumteich ("Birnbaumteich brook").