| Official Name: | Sasnava |
| Settlement Type: | Town |
| Pushpin Map: | Lithuania |
| Pushpin Label Position: | Location in Lithuania |
| Subdivision Name: |  Lithuania |
| Subdivision Type1: | County |
| Subdivision Name1: | Marijampolė County |
| Subdivision Type2: | Municipality |
| Leader Title: | Mayor of Marijampolė |
| Leader Name: | Vidmantas Brazys (LSDP) |
| Leader Title1: | Town elder |
| Leader Name1: | Nijolė Smilgienė |
| Leader Title2: | District commissary |
| Leader Name2: | Rimvydas Miliūnas |
| Population As Of: | 2011 |
| Population Total: | 546 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Coordinates: | 54.6472°N 23.4611°W |
Sasnava is a town in Marijampolė County, in southwestern Lithuania. At the 2011 census, it had a population of 546.[1] It is on the confluence of the River and its tributary, the Šešupė.
The name of the town comes from the river name Sasnà. The coat of arms of Sasnava was created according to this version. Another version claims that the Sasna stream comes from the Lithuanian word "susna" - which means decayed, withered.