The Sintashta culture is a Middle Bronze Age archaeological culture of the Southern Urals, dated to the period 2200–1750 BCE. It is the first phase of the Sintashta–Petrovka complex, c. 2200–1750 BCE. The culture is named after the Sintashta archaeological site, in Chelyabinsk Oblast, Russia, and spreads through Orenburg Oblast, Bashkortostan, and Northern Kazakhstan. The Sintashta culture is thought to represent an eastward migration of peoples from the Corded Ware culture. It is widely regarded as the origin of the Indo-Iranian languages (or Indo-Iranic languages), whose speakers originally referred to themselves as the Arya. The earliest known chariots have been found in Sintashta burials, and the culture is considered a strong candidate for the origin of the technology, which spread throughout the Old World and played an important role in ancient warfare. Sintashta settlements are also remarkable for the intensity of copper mining and bronze metallurgy carried out there, which is unusual for a steppe culture. Among the main features of the Sintashta culture are high levels of militarism and extensive fortified settlements, of which 23 are known.
According to Russian archaeologists, the Sintashta culture emerged from the interaction of two antecedent cultures, the Poltavka culture and the Abashevo culture. Because of the difficulty of identifying the remains of Sintashta sites beneath those of later settlements, the culture was only distinguished in the 1990s from the Andronovo culture. It was then recognised as a distinct entity, forming part of the "Andronovo horizon". Results from a genetic study published in Nature in 2015 suggested that the Sintashta culture emerged as a result of an eastward migration of peoples from the Corded Ware culture.
Morphological data suggests that the Sintashta culture might have emerged as a result of a mixture of steppe ancestry from the Poltavka culture and Catacomb culture, with ancestry from Neolithic forest hunter-gatherers.