The meridian 55° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole. The 55th meridian west forms a great circle with the 125th meridian east.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 55th 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;" | Baffin Bay ! scope="row" | 🇬🇱 ! scope="row" style="background:#b0e0e6;" | Baffin Bay ! scope="row" style="background:#b0e0e6;" | Davis Strait ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Fortune Bay ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" | 🇸🇷 ! scope="row" | 🇧🇷 ! scope="row" | 🇵🇾 ! scope="row" | 🇦🇷 ! scope="row" | 🇧🇷 ! scope="row" | 🇺🇾 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | South Shetland Islands ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica