| Mariensee | |
| Type: | Ortsteil |
| Town: | Neustadt am Rübenberge |
| Coordinates: | 52.5631°N 9.4867°W |
| Image Coa: | Wappen Esperke.png |
| State: | Lower Saxony |
| Elevation: | 41 |
| Area: | 9.52 |
| Population: | 1095 |
| Population As Of: | 2021 |
| Postal Code: | 31535 |
| Area Code: | 05034 |
| District: | Hanover |
Mariensee is a village in Hanover Region, Lower Saxony in Germany. It is part of the town Neustadt am Rübenberge. Its population was 1,195 in April 2021.[1]