| Svinoy | |
| Native Name: | Sangi Mugan |
| Coordinates: | 39.75°N 84°W |
| Pushpin Map: | Caspian Sea |
| Pushpin Label Position: | right |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Absheron Region |
Svinoy, Sangi-Mugan Island or Muğan daşı (Azerbaijani: Səngi Muğan, Russian: Ostrov Svinoy), is an island in the Caspian Sea located south of Baku, Azerbaijan.
This island lies south of the Baku Archipelago, 16 km off the shore. Svinoy is about 1 km in length and 0.6 km wide.[1] Although geographically quite far from Baku, This island is considered part of the Baku Archipelago.
On Svinoy Island, there is an automatic station for the monitoring of local water pollution.[2]
Stenka Razin's Cossacks crushed the fleet of the Safavid Shah Suleiman I of Persia in the waters off Svinoy Island in 1669.[3] The southern bay of the island is an ideal place for underwater archaeology.[4]