The meridian 30° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, the Southern Ocean, and Antarctica to the South Pole.
|Co-ordinates||Country, territory or sea||Notes|
|Greenland||Northern Peary Land|
|Frederick E. Hyde Fjord|
|Greenland||Southern Peary Land|
|Greenland||Mainland and Sokongen Island|
|Antarctica||Claimed by both Argentina (Argentine Antarctica) and United Kingdom (British Antarctic Territory)|