The meridian 86° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Gulf of Mexico, the Caribbean Sea, Central America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
The 86th meridian west forms a great circle with the 94th meridian east.
Starting at the North Pole and heading south to the South Pole, the 86th meridian west passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Nunavut — Ellesmere Island, Axel Heiberg Island, Stor Island and Ellesmere Island again | ||
| Jones Sound | ||
| Nunavut — Devon Island | ||
| Lancaster Sound | ||
| Nunavut — Baffin Island | ||
| Admiralty Inlet | ||
| Nunavut — Yeoman Island | ||
| Admiralty Inlet | ||
| Nunavut — Baffin Island | ||
| Gulf of Boothia | ||
| Nunavut — Melville Peninsula (mainland) | ||
| Roes Welcome Sound | ||
| Nunavut — Southampton Island | ||
| Hudson Bay | ||
| Ontario | ||
| Lake Superior | Passing just west of Michipicoten Island, Ontario, (at) | |
| Michigan | ||
| Lake Michigan | ||
| Michigan — North Manitou Island and mainland Indiana — from Kentucky — from Tennessee — from Alabama — from Florida — from | ||
| Gulf of Mexico | ||
| Caribbean Sea | Passing between the islands of Roatán (at) and Guanaja (at), | |
| Pacific Ocean | Passing just west of (at) | |
| Southern Ocean | ||
| Antarctica | Territory claimed by (Antártica Chilena Province) | |