Draw an imaginary line around the middle of Earth and you get the Equator, the 0° line of latitude that separates the Northern and Southern Hemispheres. It stretches about 40,075 kilometers around the planet, slightly longer than the distance measured from pole to pole because Earth bulges around its middle as it rotates.
But despite its enormous length, most of the Equator does not cross land. About 78.7 percent runs through the oceans, leaving only a relatively short stretch on land. Along that stretch, the question of how many countries it crosses is less straightforward than it might seem.
Eleven Countries, or Thirteen?
The commonly cited count is 11 countries. From west to east, they are São Tomé and Príncipe, Gabon, the Republic of the Congo, the Democratic Republic of the Congo, Uganda, Kenya, Somalia, Indonesia, Ecuador, Colombia, and Brazil.
Seven are in Africa, three are in South America, and Indonesia is the only Asian country directly crossed by the Equator. But some sources count 13 by including the Maldives and Kiribati.
The difference comes from how a country's territory is defined for this purpose. If the count is limited to land directly crossed by the Equator, the number is generally 11. Broader interpretations that include the wider territories and surrounding waters of island countries can bring it to 13.
That distinction matters particularly for Kiribati. Its islands lie on both sides of the Equator and the International Date Line, making it the only country whose territory extends into all four hemispheres.
From Africa to Ecuador and Indonesia
The Equator has left physical markers in several countries, but some are more famous than others. On São Tomé and Príncipe's Ilhéu das Rolas, a stone monument built in 1936 marks the Equator with a world map mosaic. It was created in the same year as Ecuador's first Equator monument, although the two were built independently.
In Ecuador, the line has become part of the country's identity. The name “Ecuador” itself comes directly from the Spanish word for Equator, making it the only country named after a geographic feature of this kind.
Near Quito stands the Mitad del Mundo monument, built between 1979 and 1982 to mark the supposed midpoint of the world. Modern satellite measurements, however, place the actual Equator more than 200 meters away from the monument because earlier measurements relied on less precise 18th-century geodesy.
The Equator then crosses the Pacific before reaching Indonesia, the only Asian country on the line. It passes through parts of Sumatra, Borneo, Sulawesi, and the Maluku Islands, while Pontianak is widely known as the major Indonesian city associated with 0° latitude.
The Equator Monument in Pontianak has its own history. The first marker was established in 1928 by a Dutch geographical expedition, followed by an iron cylinder in 1930 and a more elaborate directional structure in 1938. A major renovation in 1990 added a replica of the original marker inside the monument.
Around the March and September equinoxes, the Sun can pass almost directly overhead at the Equator. For a brief period, objects standing there can cast little or no vertical shadow, creating a striking reminder that this line is not merely a feature on a map.
A Line That Changes the Rules
The Equator also reveals some unusual effects of Earth's shape and rotation. A point at the Equator moves at roughly 1,670 kilometers per hour as Earth spins, much faster than a point near the poles. That extra rotational speed can give spacecraft launched eastward from near the Equator an additional boost.
It also helps explain why Mount Chimborazo in Ecuador holds a geographical distinction that often surprises visitors. Although Mount Everest is higher above sea level, Chimborazo's position near the Equator places its summit more than 2,000 meters farther from Earth's center because the planet bulges outward around the middle.
So, does the Equator cross 11 countries or 13?
The answer depends on what is being counted. But whether the line is traced across land alone or through broader national territories, the Equator turns a simple line at 0° latitude into a remarkable journey through geography, history, and the physics of a rotating planet.
