Sagar Island - Wikipedia
Sagar Island is an island in the Ganges delta, lying on the Continental Shelf of Bay of Bengal about 100 km (54 nautical miles) south of Kolkata. This island forms the Sagar CD Block in Kakdwip subdivision of South 24 Parganas district in the Indian State of West Bengal.
Lok Sabha constituency: Mathurapur (SC)
Elevation: 4 m (13 ft)
Country: India
District: South 24 Parganas