| South Cinque Island | |
| Sobriquet: | Ga-o-ta-koi |
| Map: | India Andaman and Nicobar Islands |
| Coordinates: | 11.27°N 92.7°W |
| Location: | Bay of Bengal |
| Archipelago: | Andaman Islands |
| Waterbody: | Indian Ocean |
| Total Islands: | 1 |
| Area Km2: | 4.557 |
| Area Footnotes: | [1] |
| Length Km: | 5.5 |
| Width Km: | 1.5 |
| Coastline Km: | 14 |
| Elevation M: | 166 |
| Country: |  India |
| Country Admin Divisions Title: | District |
| Country Admin Divisions: | South Andaman |
| Country Admin Divisions Title 1: | Island group |
| Country Admin Divisions 1: | Andaman Islands |
| Country Admin Divisions Title 2: | Island sub-group |
| Country Admin Divisions 2: | Cinque Islands |
| Country Admin Divisions Title 3: | Tehsil |
| Country Admin Divisions 3: | Port Blair Tehsil |
| Population: | 0 |
| Population As Of: | 2011 |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 744202[2] |
| Area Code Type: | Telephone code |
| Area Code: | 031927 [3] |
| Iso Code Type: | ISO code |
| Iso Code: | IN-AN-00[4] |
South Cinque Island or Ga-o-ta-koi[5] is an uninhabited island of the Andaman Islands. It belongs to the South Andaman administrative district, part of the Indian union territory of Andaman and Nicobar Islands.[6] The island lies 41km (25miles) south from Port Blair.
The island belongs to the Cinque Islands of Rutland Archipelago and is located between North Cinque Island (1.5km (00.9miles) to the north) and Passage Island (6.2km (03.9miles) to the south). The passage between South Cinque and North Cinque is called Cinque Strait.South Cinque Island and North Cinque Island, 1.5km (00.9miles) to the north, are sometimes considered to be a single Cinque Island.
Politically, South Cinque Island is part of Port Blair Taluk.[7]
A new species of blenny, Alloblennius frondiculus was found in the surrounding waters.[8]