The meridian 177° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
The 177th meridian west forms a great circle with the 3rd meridian east.
Starting at the North Pole and heading south to the South Pole, the 177th meridian west passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Chukchi Sea | Passing just east of Wrangel Island, Chukotka Autonomous Okrug, (at) | |
| Chukotka Autonomous Okrug | ||
| Bering Sea | Passing just east of Kanaga Island, Alaska, (at) Passing just west of Adak Island, Alaska, (at) | |
| Pacific Ocean | Passing just east of Midway Atoll, (at) Passing just west of Howland Island, (at) Passing just west of Chatham Island, (at) | |
| Southern Ocean | ||
| Antarctica | Ross Dependency, claimed by | |