Reinstorfer See is a lake in the Nordwestmecklenburg district in Mecklenburg-Vorpommern, Germany.

It has an elevation of 46.9 metres and a surface area of 0.074 km².

It is located northeast of the eponymous village Reinstorf not far from the main road 192 in the midst of a bog and reed area.

The marshy bank is completely wooded and drained.

The surrounding heights reach southeast of the lake over sixty meters NHN .