Greek Crimea concerns the ancient Greek settlements on the Crimean Peninsula. Greek city-states first established colonies along the Black Sea coast of Crimea in the 7th or 6th century BC. Several colonies were established in the vicinity of the Kerch Strait, then known as the Cimmerian Bosporus. The density of colonies around the Cimmerian Bosporus was unusual for Greek colonization and reflected the importance of the area. The majority of these colonies were established by Ionians from the city of Miletus in Asia Minor. By the mid-1st century BC the Bosporan Kingdom became a client state of the late Roman Republic, ushering in the era of Roman Crimea during the Roman Empire.

Colonies in antiquity were post-Iron Age city-states founded from a mother-city or metropolis rather than a territory-at-large. Bonds between a colony and its metropolis often remained close, and took specific forms during the period of classical antiquity. Generally, colonies founded by the ancient Phoenicians, Carthage, Rome, Alexander the Great and his successors remained tied to their metropolis, though Greek colonies of the Archaic and Classical eras were sovereign and self-governing from their inception. While Greek colonies were often founded to solve social unrest in the mother-city by expelling a part of the population, Hellenistic, Roman, Carthaginian, and Han Chinese colonies were used for trade, expansion and empire-building.