| Art: | Ortsteil |
| Municipality: | Duingen |
| Marienhagen | |
| Image Coa: | Wappen Marienhagen.png |
| Coordinates: | 52.0353°N 9.6878°W |
| State: | Lower Saxony |
| District: | Hildesheim |
| Elevation: | 179 |
| Area: | 6.23 |
| Population: | 727 |
| Stand: | 2015-12-31 |
| Postal Code: | 31094 |
| Area Code: | 05185 |
| Licence: | HI |
| Website: | www.marienhagen.de |
Marienhagen is a village and a former municipality in the district of Hildesheim in Lower Saxony, Germany. Since 1 November 2016, it is part of the municipality Duingen.