The meridian 139° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, Australasia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. The 139th meridian east forms a great circle with the 41st meridian west.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 139th meridian east passes through: ! scope="col" width="130" | 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;" | Laptev Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Sea of Okhotsk ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Sea of Japan ! scope="row" | 🇯🇵 ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Arafura Sea ! scope="row" style="background:#b0e0e6;" | Gulf of Carpentaria ! scope="row" | 🇦🇺 ! scope="row" style="background:#b0e0e6;" | Indian Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica