The meridian 178° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, New Zealand, the Southern Ocean, and Antarctica to the South Pole. The 178th meridian east forms a great circle with the 2nd meridian west.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 178th 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;" | East Siberian Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Anadyrskiy Liman ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Bering Sea ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" | ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" | ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" | ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" | 🇳🇿 ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica