The meridian 140° 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.
Starting at the North Pole and heading south to the South Pole, the 140th meridian west passes through:
| Country, territory or sea | Notes |
|---|---|
| Arctic Ocean | |
| Yukon | |
| Alaska | |
| Pacific Ocean | |
| Island of Nuku Hiva | |
| Pacific Ocean | Passing just east of the island of Ua Pu, Passing just east of the atoll of Fakahina, |
| Southern Ocean | |
| Antarctica | Unclaimed territory |
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