Circle dance, or chain dance, is a style of social dance done in a circle, semicircle or a curved line to musical accompaniment, such as rhythm instruments and singing, and is a type of dance where anyone can join in without the need of partners. Unlike line dancing, circle dancers are in physical contact with each other; the connection is made by hand-to-hand, finger-to-finger or hands-on-shoulders, where they follow the leader around the dance floor. Ranging from gentle to energetic, the dance can be an uplifting group experience or part of a meditation.

Circle dancing, probably the oldest known dance formation, is an ancient tradition common to many cultures for marking special occasions, rituals, strengthening community and encouraging togetherness. Circle dances are choreographed to many different styles of music and rhythms. Modern circle dance mixes traditional folk dances, mainly from European or Near Eastern sources, with recently choreographed ones to a variety of music both ancient and modern. There is a growing repertoire of new circle dances to classical music and contemporary songs.

Modern circle dancing is found in many cultures, including Arabic (Levantian and Iraqi), Israeli (see Jewish dance and Israeli folk dancing), Luri, Assyrian, Kurdish, Turkish, Armenian, Azerbaijani, Maltese, Ukraine and Balkan. It also found in South Asia such as Nati of Himachal Pradesh, Harul of Uttarakhand, Wanvun of Kashmir, Jhumair of Jharkhand, Fugdi of Goa and Deuda and Dhan Nach of Nepal. Despite its immense reputation in the Middle East and southeast Europe, circle dancing also has a historical prominence in Brittany, Asturias, Catalonia, and Ireland to the west of Europe, and also in South America (Peruvian), Tibet, and with Native Americans (see ghost dance). In its more meditative form, it is also used in worship in various religious traditions including the Church of England and the Islamic Haḍra Dhikr (or Zikr) dances.

Ghost Dance is an example of a native American circle dance.

Cave painting found in south Asia since Paleolithic period. Cave paintings of Bhimbetka rock shelters of Madhya Pradesh in India shows the painting of dancers and musician which is from Mesolithic period. It shows people dancing by holding hand together.

Medieval tombstones called "Stećci" (singular "Stećak") in Bosnia and Hercegovina, dating from the end of the 12th century to the 16th century, bear inscriptions and figures which look like dancers in a chain. Men and women are portrayed dancing together holding hands at shoulder level but occasionally the groups consist of only one sex.

In Macedonia, near the town of Zletovo, the murals on the monastery of Lesnovo (Lesnovo Manastir), which date from the 14th century, show a group of young men linking arms in a round dance. A chronicle from 1344 urges the people of the city of Zadar to sing and dance circle dances for a festival. However, a reference comes from Bulgaria, in a manuscript of a 14th-century sermon, which called chain dances "devilish and damned."

The circle dance of Germany is called "Reigen"; it dates from the 10th century, and may have originated from devotional dances at early Christian festivals. Dancing around the church or a fire was frequently denounced by church authorities which only underscores how popular it was. One of the frescos (dating from the 14th century) in Tyrol, at Runkelstein Castle, depicts Elisabeth of Poland, Queen of Hungary leading a chain dance. Circle dances were also found in Czech Republic, dating to the 15th century. Dancing was primarily done around trees on the village green. In Poland as well the earliest village dances were in circles or lines accompanied by the singing or clapping of the participants.