The meridian 109° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole.[1]
The 109th meridian east forms a great circle with the 71st meridian west.
Starting at the North Pole and heading south to the South Pole, the 109th meridian east passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Laptev Sea | ||
| Krasnoyarsk Krai — Taymyr Peninsula | ||
| Khatanga Gulf | ||
| Krasnoyarsk Krai Sakha Republic — from Irkutsk Oblast — from Republic of Buryatia — from Irkutsk Oblast — from Republic of Buryatia — from, passing through Lake Baikal Zabaykalsky Krai — from | ||
| Inner Mongolia Shaanxi – from Inner Mongolia – from Shaanxi – from, passing just east of Xi'an (at) Chongqing – from Hubei – from Chongqing – from Guizhou – from Hunan – from Guizhou – from Guangxi – from Guizhou – from Guangxi – from | ||
| South China Sea | Gulf of Tonkin – passing just west of Weizhou Island, (at) | |
| Island of Hainan | ||
| South China Sea | ||
| Quảng Ngãi Bình Định – from Phú Yên – from Khánh Hòa – from Ninh Thuận – from | ||
| South China Sea | Passing just east of the island of Cù Lao Thu, (at) | |
| Island of Serasan | ||
| South China Sea | ||
| West Kalimantan, on the island of Borneo | ||
| South China Sea | Passing just east of the island of Karimata, (at) | |
| Java Sea | ||
| Islands of Java and Kambangan Island | ||
| Indian Ocean | ||
| Southern Ocean | ||
| Antarctica | Australian Antarctic Territory, claimed by | |