What is the name of the line of latitude at 23.5 degrees north?

The line of latitude at about 23.5 degrees north is the Tropic of Cancer.

The Tropic of Cancer marks the northernmost latitude where the Sun can appear directly overhead at noon. This occurs at the June solstice, when Earth’s Northern Hemisphere is tilted toward the Sun. Its exact latitude slowly changes because Earth’s axial tilt varies over long periods.

The line crosses parts of North America, Africa, and Asia, as well as the Atlantic and Pacific oceans. Countries near or crossed by it include Mexico, the Bahamas, Egypt, Saudi Arabia, India, and China.

The Tropic of Capricorn is its southern counterpart at about 23.5 degrees south. The Equator is at zero degrees latitude, while the Arctic Circle is much farther north. Together, these reference lines help describe Earth’s climate zones and seasonal geometry.