The meridian 27° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Europe, Asia, Africa, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. The 27th meridian east forms a great circle with the 153rd meridian west.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 27th meridian east passes through: ! scope="col" width="125" | Co-ordinates ! scope="col" | Country, territory or sea ! scope="col" | Notes ! scope="row" style="background:#b0e0e6;" | Arctic Ocean ! scope="row" | 🇳🇴 ! scope="row" style="background:#b0e0e6;" | Barents Sea ! scope="row" | 🇳🇴 ! scope="row" style="background:#b0e0e6;" | Barents Sea ! scope="row" | 🇳🇴 ! scope="row" | 🇫🇮 ! scope="row" style="background:#b0e0e6;" | Baltic Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Baltic Sea ! scope="row" | 🇪🇪 ! scope="row" | 🇱🇻 ! scope="row" | 🇧🇾 ! scope="row" | 🇺🇦 ! scope="row" | 🇲🇩 ! scope="row" | 🇷🇴 ! scope="row" | 🇧🇬 ! scope="row" | 🇹🇷 ! scope="row" style="background:#b0e0e6;" | Sea of Marmara ! scope="row" | 🇹🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇬🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇬🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇬🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇬🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇬🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇪🇬 ! scope="row" | ! scope="row" | 🇸🇸 ! scope="row" | 🇨🇫 ! scope="row" | 🇨🇩 ! scope="row" | 🇿🇲 ! scope="row" | 🇿🇼 ! scope="row" | 🇧🇼 ! scope="row" | 🇿🇦 ! scope="row" style="background:#b0e0e6;" | Indian Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica