| Official Name: | Lchashen |
| Native Name: | Լճաշեն |
| Pushpin Map: | Armenia#Gegharkunik |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Name: | Armenia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Gegharkunik |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Sevan |
| Population Footnotes: | [1] |
| Population As Of: | 2011 |
| Population Total: | 4,969 |
| Timezone: | AMT |
| Utc Offset: | +4 |
| Coordinates: | 40.5203°N 44.9308°W |
Lchashen (Armenian: [[wikt:Լճաշեն|Լճաշեն]]) is a village in the Sevan Municipality of the Gegharkunik Province of Armenia.
The settlement dates back to the 3rd millennium BC. It has a Bronze Age cemetery, a Urartian Iron Age fortress, and a 13th-century church. It is an important archaeological site associated with the Lchashen-Metsamor culture (Etiuni).