| Official Name: | Semeliškės |
| Settlement Type: | Town |
| Pushpin Map: | Lithuania |
| Pushpin Map Caption: | Location of Semeliškės in Lithuania |
| Coordinates: | 54.6689°N 24.6561°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Lithuania |
| Subdivision Type1: | County |
| Subdivision Name1: | Vilnius County |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Elektrėnai municipality |
| Subdivision Type3: | Eldership |
| Subdivision Name3: | Semeliškės eldership |
| Population Total: | 516 |
| Population As Of: | 2021 |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Semeliškės is a town in Elektrėnai municipality, Vilnius County, east Lithuania. According to the Lithuanian census of 2011, the town has a population of 580 people.[1] The town has a church of Catholics and Orthodox church of St. Nicolas.
Its alternate names include Sameliškės, Semelishkes, Semelishkis, Semeliškių, Sumelishki, Sumilishki, Siemieliszki, and Sumiliszk.[2]
On October 6, 1941, 962 Jews of the town were murdered in a mass execution perpetrated by an Einsatzgruppen of local policemen and Lithuanian collaborators.[3]