The meridian 46° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole.
The 46th meridian west forms a great circle with the 134th meridian east.
Starting at the North Pole and heading south to the South Pole, the 46th meridian west passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Lincoln Sea | ||
| Greenland | Sverdrup Island | |
| Arctic Ocean | ||
| Greenland | Island of Nares Land | |
| Victoria Fjord | ||
| Greenland | ||
| Atlantic Ocean | ||
| Brazil | Maranhão Tocantins Bahia Goiás Bahia - for about 16km Minas Gerais - for about 9km Bahia - for about 9km Minas Gerais São Paulo |
|
| Atlantic Ocean | ||
| Southern Ocean | ||
| South Orkney Islands | Coronation Island - claimed by both Argentina (Argentine Antarctica) and United Kingdom (British Antarctic Territory) | |
| Southern Ocean | ||
| Antarctica | Claimed by both Argentina (Argentine Antarctica) and United Kingdom (British Antarctic Territory) |
|
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