The meridian 128° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, Australia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. The 128th meridian east forms a great circle with the 52nd meridian west.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 128th 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" | 🇰🇵 ! scope="row" style="background:#b0e0e6;" | Sea of Japan ! scope="row" | 🇰🇵 ! scope="row" | 🇰🇷 ! scope="row" style="background:#b0e0e6;" | East China Sea ! scope="row" | 🇯🇵 ! scope="row" style="background:#b0e0e6;" | East China Sea ! scope="row" | 🇯🇵 ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Halmahera Sea ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Kao Bay ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Halmahera Sea ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Molucca Sea ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Ceram Sea ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Banda Sea ! scope="row" | 🇮🇩 ! scope="row" style="background:#b0e0e6;" | Timor Sea ! scope="row" | 🇦🇺 ! scope="row" style="background:#b0e0e6;" | Indian Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica