The 143rd meridian east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, Australasia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole.
The 143rd meridian east forms a great circle with the 37th meridian west.
Starting at the North Pole and heading south to the South Pole, the 143rd meridian east passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Russia | Faddeyevsky Island and Bunge Land, New Siberian Islands | |
| East Siberian Sea | Sannikov Strait | |
| Russia | Great Lyakhovsky Island, New Siberian Islands | |
| East Siberian Sea | Laptev Strait | |
| Russia | ||
| Sea of Okhotsk | ||
| Russia | Island of Sakhalin | |
| Sea of Okhotsk | ||
| Russia | Island of Sakhalin | |
| Sea of Okhotsk | ||
| Japan | Island of Hokkaidō | |
| Pacific Ocean | Passing just west of Aua Island, Papua New Guinea Passing just east of Wuvulu Island, Papua New Guinea |
|
| Papua New Guinea | ||
| Coral Sea | Torres Strait - passing amongst the Torres Strait Islands, Queensland, Australia | |
| Australia | Queensland New South Wales Victoria |
|
| Indian Ocean | Australian authorities consider this to be part of the Southern Ocean | |
| Southern Ocean | ||
| Antarctica | Australian Antarctic Territory, claimed by Australia |
|
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