The meridian 165° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
The 165th meridian west forms a great circle with the 15th meridian east.
The Samoa Time Zone and Phoenix Islands Time Zone is based on the mean solar time of this meridian.
Starting at the North Pole and heading south to the South Pole, the 165th meridian west passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Chukchi Sea | ||
| Alaska | ||
| Chukchi Sea | Kotzebue Sound | |
| Alaska — Seward Peninsula | ||
| Bering Sea | Norton Sound | |
| Alaska — Yukon–Kuskokwim Delta | ||
| Bering Sea | Passing just west of Unimak Island, Alaska, (at) | |
| Alaska — Tigalda Island | ||
| Pacific Ocean | ||
| Southern Ocean | ||
| Antarctica | Ross Dependency, claimed by | |