The meridian 142° 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 142nd meridian west forms a great circle with the 38th meridian east.
Starting at the North Pole and heading south to the South Pole, the 142nd meridian west passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Beaufort Sea | ||
| Alaska | ||
| Pacific Ocean | Passing just east of Takume atoll, (at) Passing just west of Rekareka atoll, (at) Passing just east of Marokau atoll, (at) Passing just east of Ravahere atoll, (at) Passing just west of Nengonengo atoll, (at) | |
| Southern Ocean | ||
| Antarctica | Unclaimed territory | |