The 77th parallel north is a circle of latitude that is 77 degrees north of the Earth's equatorial plane, in the Arctic. It crosses the Atlantic Ocean, Europe, Asia, the Arctic Ocean and North America. It is the northernmost integral parallel that passes through continental mainland (namely the Taymyr Peninsula of Siberia). At this latitude the sun is visible for 24 hours, 0 minutes during the summer solstice and nautical twilight during the winter solstice.

Around the world

Starting at the Prime Meridian and heading eastwards, the parallel 77° north passes through: ! scope="col" width="125" | Coordinates ! scope="col" | Country, territory or sea ! scope="col" | Notes ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" | 🇳🇴 ! scope="row" style="background:#b0e0e6;" | Barents Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Kara Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Kara Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Kara Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Laptev Sea ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Laptev Sea ! scope="row" style="background:#b0e0e6;" | Arctic Ocean ! scope="row" style="background:#b0e0e6;" | East Siberian Sea ! scope="row" style="background:#b0e0e6;" | Arctic Ocean ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Moore Bay ! scope="row" style="background:#b0e0e6;" | Unnamed waterbody ! scope="row" style="background:#b0e0e6;" | Hazen Strait ! scope="row" style="background:#b0e0e6;" | Byam Martin Channel ! scope="row" style="background:#b0e0e6;" | Desbarats Strait ! scope="row" style="background:#b0e0e6;" | Unnamed waterbody ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Napier Bay ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Norwegian Bay ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Baffin Bay ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Baffin Bay ! scope="row" | 🇬🇱 ! scope="row" | 🇬🇱 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean