The meridian 120° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Indian Ocean, Australia, the Southern Ocean, and Antarctica to the South Pole. In mean solar time this offset is the UTC+08:00 time zone. The 120th meridian east forms a great circle with the 60th meridian west. The 120th meridian east is the easternmost of South China Sea, according to Vietnam's typhoon warning region.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 120th 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" | ! scope="row" style="background:#b0e0e6;" | Bohai Sea ! scope="row" | ! scope="row" style="background:#b0e0e6;" | Yellow Sea ! scope="row" | ! scope="row" style="background:#b0e0e6;" | East China Sea ! scope="row" style="background:#b0e0e6;" | South China Sea ! scope="row" | 𝜙 ! scope="row" style="background:#b0e0e6;" | South China Sea ! scope="row" | 𝜙 ! scope="row" style="background:#b0e0e6;" | Sulu Sea ! scope="row" | 𝜙 ! scope="row" style="background:#b0e0e6;" | Sulu Sea ! scope="row" | 𝜙 ! scope="row" style="background:#b0e0e6;" | Sulu Sea ! scope="row" | 𝜙 ! scope="row" style="background:#b0e0e6;" | Celebes Sea ! scope="row" style="background:#b0e0e6;" | Makassar Strait ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Flores Sea ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Sumba Strait ! 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