The meridian 104° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. The 104th meridian east forms a great circle with the 76th meridian west.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 104th 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" style="background:#b0e0e6;" | Laptev Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Laptev Sea ! scope="row" | 🇷🇺 ! scope="row" | 🇲🇳 ! scope="row" | ! scope="row" | 🇻🇳 ! scope="row" | 🇱🇦 ! scope="row" | 🇻🇳 ! scope="row" | 🇱🇦 ! scope="row" | 🇹🇭 ! scope="row" | 🇰🇭 ! scope="row" style="background:#b0e0e6;" | Gulf of Thailand ! scope="row" | 🇻🇳 ! scope="row" style="background:#b0e0e6;" | Gulf of Thailand ! scope="row" style="background:#b0e0e6;" | South China Sea ! scope="row" | 🇲🇾 ! scope="row" | 🇸🇬 ! scope="row" style="background:#b0e0e6;" | Singapore Strait ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | South China Sea ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Indian Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica