The 43rd parallel north is a circle of latitude that is 43 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. On 21 June the sun averages, with negligible variance, its local maximum, 70.83 degrees in the sky. At this latitude the sun is visible for 15 hours, 22 minutes during the summer solstice and 9 hours, 0 minutes during the winter solstice.

Around the world

Starting at the Prime Meridian and heading eastwards, the parallel 43° north passes through: ! scope="col" width="125" | Coordinates ! scope="col" | Country, territory or sea ! scope="col" | Notes ! scope="row" | 🇫🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇫🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇫🇷 ! scope="row" style="background:#b0e0e6;" | Mediterranean Sea ! scope="row" | 🇮🇹 ! scope="row" style="background:#b0e0e6;" | Adriatic Sea ! scope="row" | 🇭🇷 ! scope="row" | 🇧🇦 ! scope="row" | 🇲🇪 ! scope="row" | 🇷🇸 ! scope="row" | Kosovo or 🇷🇸 ! scope="row" | 🇷🇸 ! scope="row" | 🇧🇬 ! scope="row" style="background:#b0e0e6;" | Black Sea ! scope="row" | Abkhazia or Passing through Sukhumi. ! scope="row" | ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Caspian Sea ! scope="row" | 🇰🇿 ! scope="row" | 🇺🇿 ! scope="row" | 🇰🇿 ! scope="row" | 🇰🇬 ! scope="row" | 🇰🇿 ! scope="row" | ! scope="row" | 🇲🇳 ! scope="row" | ! scope="row" | 🇰🇵 ! scope="row" | ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Sea of Japan ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Sea of Japan ! scope="row" | 🇷🇺 ! scope="row" style="background:#b0e0e6;" | Sea of Japan ! scope="row" | 🇯🇵 ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" | 🇺🇸 The parallel 43° north forms most of the boundary between the State of Nebraska and the State of South Dakota. The parallel formed the northern border of the historic and extralegal Territory of Jefferson. ! scope="row" style="background:#b0e0e6;" | Lake Michigan ! scope="row" | 🇺🇸 ! scope="row" | 🇨🇦 ! scope="row" | 🇺🇸 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" | 🇪🇸 passing through Lugo, Galiza Reinosa, Cantabria ! scope="row" | 🇫🇷