The meridian 38° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, South America, the Southern Ocean, and Antarctica to the South Pole.
The 38th meridian west forms a great circle with the 142nd meridian east.
Starting at the North Pole and heading south to the South Pole, the 38th meridian west passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Lincoln Sea | ||
| Cape Washington | ||
| Hunt Fjord | ||
| Roosevelt Land | ||
| Harder Fjord | ||
| Amundsen Land and Hans Tausen Ice Cap | ||
| Sermilik Fjord | ||
| Ammassalik Island | ||
| Atlantic Ocean | ||
| Ceará Rio Grande do Norte — from Paraíba — from Pernambuco — from Alagoas — from Sergipe — from Bahia — for about 2 km from Sergipe — from Bahia — from Sergipe — from Bahia — for about 4 km from Sergipe — from Bahia — from | ||
| Atlantic Ocean | ||
| Island of South Georgia | ||
| Atlantic Ocean | ||
| Southern Ocean | ||
| Antarctica | Claimed by both (Argentine Antarctica) and (British Antarctic Territory) | |