The meridian 45° 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 45th meridian east forms a great circle with the 135th meridian west. The meridian is the mid point of the Moscow Time.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 45th meridian east passes through: ! scope="col" width="115" | 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" | 🇦🇲 ! scope="row" | 🇦🇿 ! scope="row" | 🇦🇲 ! scope="row" | 🇦🇿 ! scope="row" | 🇮🇷 ! scope="row" | 🇮🇶 ! scope="row" | 🇸🇦 ! scope="row" | 🇾🇪 ! scope="row" style="background:#b0e0e6;" | Indian Ocean ! scope="row" | 🇸🇴 ! scope="row" | 🇪🇹 ! scope="row" | 🇸🇴 ! scope="row" style="background:#b0e0e6;" | Indian Ocean ! scope="row" | 🇲🇬 ! scope="row" style="background:#b0e0e6;" | Indian Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica