31st parallel north

31°

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31st parallel north

Sign marking the 31st parallel north at Cape Sata, Japan

In the United States, the 31st parallel defines part of the border between Mississippi and Louisiana, and part of the border between Alabama and Florida.

The 31st parallel north is a circle of latitude that is 31 degrees north of the Earth's equatorial plane. It crosses Africa, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. At this latitude the sun is visible for 14 hours, 10 minutes during the summer solstice and 10 hours, 8 minutes during the winter solstice.^[1]

Part of the border between Iran and Iraq is defined by the parallel.

In the United States, it defines part of the border between the states of Mississippi and Louisiana, and most of the border between Alabama and Florida. Andrew Ellicott surveyed this parallel in 1797, which in Pinckney's Treaty two years before had been defined as the border between the United States and the Spanish territory of West Florida.

Around the world

Starting at the Prime Meridian and heading eastwards, the parallel 31° north passes through:

Coordinates	Country, territory or sea	Notes
31°0′N 0°0′E	Algeria
31°0′N 9°22′E	Tunisia
31°0′N 10°17′E	Libya
31°0′N 17°33′E	Mediterranean Sea	Gulf of Sidra
31°0′N 20°8′E	Libya
31°0′N 24°56′E	Egypt
31°0′N 28°43′E	Mediterranean Sea
31°0′N 29°35′E	Egypt
31°0′N 34°21′E	Israel	Passing just north of Yeruham
31°0′N 35°24′E	Jordan
31°0′N 37°30′E	Saudi Arabia	Passing through Arar
31°0′N 42°14′E	Iraq	Passing through Nasiriyah
31°0′N 47°42′E	Iran /  Iraq border
31°0′N 48°1′E	Iran
31°0′N 61°50′E	Afghanistan
31°0′N 66°35′E	Pakistan	Balochistan Punjab
31°0′N 74°33′E	India	Punjab Himachal Pradesh Uttarakhand
31°0′N 79°32′E	People's Republic of China	Tibet Sichuan Chongqing Hubei Anhui Zhejiang Jiangsu Zhejiang - for about 5 km (3.1 mi) Jiangsu - for about 5 km (3.1 mi) Zhejiang - for about 11 km (6.8 mi) Shanghai
31°0′N 121°53′E	East China Sea
31°0′N 130°39′E	Japan	Cape Sata, the southernmost point of the island of Kyūshū
31°0′N 130°41′E	Pacific Ocean
31°0′N 116°20′W	Mexico	Baja California
31°0′N 114°50′W	Gulf of California
31°0′N 113°6′W	Mexico	Sonora Chihuahua
31°0′N 105°33′W	United States	Texas Louisiana Mississippi / Louisiana border Mississippi Alabama Alabama / Florida border Georgia
31°0′N 81°28′W	Atlantic Ocean
31°0′N 9°49′W	Morocco
31°0′N 3°33′W	Algeria

See also

• 30th parallel north
• 32nd parallel north

References

1. "Duration of Daylight/Darkness Table for One Year". U.S. Naval Observatory. 2019-09-24. Archived from the original on 2019-10-12. Retrieved 2021-03-10.