Kokino (Macedonian: Кокино) is a Bronze Age archaeological site in the Republic of Macedonia, approximately 30 km from the town of Kumanovo, and about 6 km from the Serbian border, in the Staro Nagoričane municipality. It is situated between about 1010 and 1030 m above sea level on the Tatićev Kamen summit and covers an area of about 90 by 50 meters, overlooking the eponymous hamlet of Kokino.

It was discovered by archeologist Jovica Stankovski, director of the national museum in Kumanovo, in 2001. In 2002, Stankovski together with Gorje Cenev (who is the head of a planetarium at a Youth Cultural Center in Skopje) published the claim that the site contains a "megalithic observatory and sacred site".

The oldest archaeological finds date from about the 19th century BC, corresponding to the early European Bronze Age. It shows signs of occupation for the period from the 19th to the 7th centuries BC. Finds from the Middle Bronze Age (c. 16th to 14th centuries BC) are the most numerous (mainly ceramic vessels, stone-mills and a few molds). An agglomeration from the Iron Age was discovered in 2009.

The Kokino "megalithic observatory" should be distinguished from the wider Kokino archaeological site. While the observatory consists of two platforms of a combined area of about 5000 square meters, the site covers about 30 hectares. From this area, an abundant amount of fragments of ceramic vessels, dated to between the 19th and the 11th centuries BC. Also found was a mould for casting bronze axes, and a pendant. The remains of vessels filled with offerings were found deposited in cracks in the rocks, which gave rise to the interpretation of the site as a "holy mountain".

The claimed archaeo-astronomical site itself consists of two platforms with an elevation difference of 19 m. The claim of the site representing an astronomical observatory was made by Stankovski and by Gjore Cenev in 2002. According to this interpretation, the site includes special stone markers used to track the movement of the Sun and Moon on the eastern horizon. The observatory used the method of stationary observation, marking positions of the Sun at the winter and summer solstice, as well as the equinox. Four stone seats or "thrones" are placed in a row on the lower platform. According to Cenev, A stone block with a marking on the upper platform marks the direction of sunrise on summer solstice when viewed from one of the seats.

Kokino was mentioned in a poster made by NASA's "Sun-Earth Connection Education Forum" in 2005.

The Cultural Heritage Protection Office of Macedonia's Ministry of Culture declared the site a "property under temporary protection" on 13 November 2008 (Decision nr. 08-1935/6). In 2009, Minister of Culture Elizabeta Kancheska-Milevska declared Kokino "one of the priorities of the Ministry of Culture’s 2009 programme".In 2009, the Republic of Macedonia also suggested the site be inscribed on the World Heritage Site.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.  

The science of observing the sky and measuring time based on its changes is almost as old as civilization itself. Many early  societies had their own calendars, and archaeologists continue to find evidence of this at various sites. 

In 2001, the ruins of a Bronze Age settlement were found outside the small Macedonian village of Kokino. Amid the signs of occupation like pieces of vessels and weapons, researchers also discovered giant stones arranged in puzzling patterns, at an elevation of over 3,300 feet. With further study, they identified these as stone markers used to track the patterns of the sun and the moon, making the site an ancient megalithic observatory, dating back nearly 3,800 years.

Two platforms, separated by a height of around 62 feet, are located at the center of the observatory’s remains. Four massive stone thrones, facing the direction of the east, make up the lower platform. The higher platform consists of markers carved into malleable andesite rocks, that indicated significant astronomical events like the summer and winter solstices, as well as the spring and autumn equinoxes.

While seated on the thrones, particularly the second one, the exact movement of light during these days could be seen. The most powerful member of the community usually took his place on this special seat, and observed the light that streamed through the carved markers, and soaked in the energy of the sun. Rituals based on these solar changes were held at the observatory.  

Information about the change in seasons was conveyed through a huge fire, visible to people living in surrounding areas. The appearance of this blaze told people when it was time to start planting, ploughing, or harvesting, allowing them to plan their agricultural calendar. Their lunar calendars followed a 19-year cycle, where, for the first 12 years, each year had 12 months—6 summer months, and 6 winter months. The remaining 7 years were divided into 13 months each.

Kokino, with its dual function as a scientific and ritual site, is of great interest to archaeoastronomy researchers, who study the sky-based rituals of ancient societies through the lens of anthropology and modern astronomy.

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