| Building Name: | Marmashen Monastery |
| Map Type: | Armenia#Shirak |
| Map Size: | 300 |
| Location: | near Marmashen, Shirak Province, Armenia |
| Geo: | 40.8427°N 43.7558°W |
| Religious Affiliation: | Armenian Apostolic Church |
| Architecture: | yes |
| Architecture Style: | Armenian |
| Year Completed: | 10th century |
Marmashen Monastery (hy|Մարմաշենի վանք) is a 10th-century Armenian monastic complex consisting of five churches near the village of Marmashen in the Shirak Province of Armenia. The buildings at Marmashen are very similar in style to those of Khtzkonk Monastery.
It was built by Vahram Pahlavouni.