The meridian 80° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, Panama, South America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.

In Antarctica, the meridian defines the western limit of the British territorial claim and passes through the Chilean claim - the two claims overlap.

The 80th meridian west forms a great circle with the 100th meridian east.

From Pole to Pole
Starting at the North Pole and heading south to the South Pole, the 80th meridian west passes through:

{| class="wikitable plainrowheaders"
! scope="col" width="120" | Co-ordinates
! scope="col" | Country, territory or sea
! scope="col" | Notes
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Arctic Ocean
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Nunavut — Ellesmere Island
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Jones Sound
| style="background:#b0e0e6;" | Passing just west of Coburg Island, Nunavut,  (at )
|-
| 
! scope="row" | 
| Nunavut — Devon Island and Philpots Island
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Baffin Bay
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Nunavut — Bylot Island
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Eclipse Sound
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Nunavut — Imiliit and Baffin Island
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Murray Maxwell Bay
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Nunavut — Kapuiviit
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Foxe Basin
| style="background:#b0e0e6;" |
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Foxe Channel
| style="background:#b0e0e6;" | Passing just east of Southampton Island, Nunavut,  (at )
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Hudson Bay
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Nunavut — Mansel Island
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Hudson Bay
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Nunavut — Gilmour Island
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Hudson Bay
| style="background:#b0e0e6;" | Passing just west of Split Island, Nunavut, 
|-
| 
! scope="row" | 
| Nunavut — Kugong Island and Flaherty Island
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Hudson Bay
| style="background:#b0e0e6;" |
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | James Bay
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Nunavut — North Twin Island
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | James Bay
| style="background:#b0e0e6;" | Passing just west of South Twin Island, Nunavut,  (at )
|-
| 
! scope="row" | 
| Ontario
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Lake Erie
| style="background:#b0e0e6;" |
|-valign="top"
| 
! scope="row" | 
| Pennsylvania — passing through Pittsburgh (at ) West Virginia — from  Virginia — from  North Carolina — from  South Carolina — from , passing through Charleston (at )
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Atlantic Ocean
| style="background:#b0e0e6;" | Passing just east of Palm Beach, Florida,  (at ) Passing through the Cay Sal Bank atoll,  (at )
|-
| 
! scope="row" | 
|
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Caribbean Sea
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Little Cayman
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Caribbean Sea
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
|
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Gulf of Panama
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Passing through the tip of the Azuero Peninsula
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Pacific Ocean
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| The mainland, Puná Island, and the mainland again
|-valign="top"
| 
! scope="row" | 
| Piura Region Lambayeque Region — from 
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Pacific Ocean
| style="background:#b0e0e6;" | Passing close between the Desventuradas Islands,  (at ) Passing some distance between the Juan Fernández Islands,  (at )
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Southern Ocean
| style="background:#b0e0e6;" |
|-valign="top"
| 
! scope="row" | Antarctica
| Defines the western limit of British Antarctic Territory, claimed by  Passes through Antártica Chilena Province, claimed by 
|-
|}

See also
79th meridian west
81st meridian west

References 

w080 meridian west
Borders of the United Kingdom
서경 80도(西經80度)는 본초 자오선에서 서쪽으로 80도 떨어진 경선이다. 북극점에서 시작하여 북극해, 북아메리카, 대서양, 남아메리카, 태평양, 남극해, 남극을 거쳐 남극점에 이른다.

서경 80도는 동경 100도와 이어져 지구의 둘레를 이룬다.

지나가는 지역 
북극점에서 남극점까지 서경 80도선은 다음 지역을 지나간다.

{| class="wikitable plainrowheaders"
! scope="col" width="120" | 좌표
! scope="col" | 나라, 지역, 해역
! scope="col" | 주석
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 북극해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 누나부트 준주 — 엘즈미어섬
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 존스 해협
| style="background:#b0e0e6;" |  누나부트 준주 코버그섬() 바로 서쪽을 지나감
|-
| 
! scope="row" | 
| 누나부트 준주 — 데번섬, 필파츠섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 배핀만
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 누나부트 준주 — 바일롯섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 이클립스 해협
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 누나부트 준주 — 래지드섬, 배핀섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 머레이맥스웰 만
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 누나부트 준주 — 젠스뭉크섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 폭스만
| style="background:#b0e0e6;" |
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 폭스 해협
| style="background:#b0e0e6;" | 사우샘프턴섬,  누나부트 준주 사우샘프턴섬() 바로 동쪽을 지나감
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 허드슨만
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 누나부트 준주 — 맨젤섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 허드슨만
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 누나부트 준주 — 길머섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 허드슨만
| style="background:#b0e0e6;" |  누나부트 준주 스플릿섬 바로 서쪽을 지나감
|-
| 
! scope="row" | 
| 누나부트 준주 — 쿠공섬, 플래허티섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 허드슨만
| style="background:#b0e0e6;" |
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 제임스만
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 누나부트 준주 — 노스트윈섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 제임스만
| style="background:#b0e0e6;" |  누나부트 준주 사우스트윈섬() 바로 서쪽을 지나감
|-
| 
! scope="row" | 
| 온타리오주
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 이리호
| style="background:#b0e0e6;" |
|-valign="top"
| 
! scope="row" | 
| 펜실베이니아주 — 피츠버그()를 통과함 웨스트버지니아주 — 부터 버지니아주 — 부터 노스캐롤라이나주 — 부터 사우스캐롤라이나주 — 부터, 찰스턴()을 통과함
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 대서양
| style="background:#b0e0e6;" |  팜비치() 바로 동쪽을 지나감 솔뱅크 섬 환초()를 통과함
|-
| 
! scope="row" | 
|
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 카리브해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 리틀케이맨섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 카리브해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
|
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 파나마만
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 아주에로반도 끝을 통과함
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 태평양
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 본토, 푸나섬, 본토
|-valign="top"
| 
! scope="row" | 
| 피우라주 람바예케주 — 
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 태평양
| style="background:#b0e0e6;" |  데스벤투라다스 제도()와 근접하게 통과함  후안페르난데스 제도,  후안페르난데스 제도() 사이를 통과함
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 남극해
| style="background:#b0e0e6;" |
|-valign="top"
| 
! scope="row" | 남극
| 가 영유권을 주장하는 영국령 남극 지역의 서쪽 경계 가 영유권을 주장하는 안타르티카칠레나현을 통과함
|-
|}

같이 보기 
 서경 79도
 서경 81도

서경 080도