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.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 46th meridian west passes through: ! scope="col" width="120" | Co-ordinates ! scope="col" | Country, territory or sea ! scope="col" | Notes ! scope="row" style="background:#b0e0e6;" | Arctic Ocean ! scope="row" style="background:#b0e0e6;" | Lincoln Sea ! scope="row" | 🇬🇱 ! scope="row" style="background:#b0e0e6;" | Lincoln Sea ! scope="row" | 🇬🇱 ! scope="row" style="background:#b0e0e6;" | Victoria Fjord ! scope="row" | 🇬🇱 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" | 🇧🇷 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | South Orkney Islands ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica