The Scythians or Scyths, and sometimes also referred to as the Classical Scythians and the Pontic Scythians, were an ancient Eastern Iranian equestrian nomadic people who had migrated from Central Asia to the Pontic Steppe in modern-day Ukraine and Southern Russia from approximately the 7th century BC until the 3rd century BC.

Skilled in mounted warfare, the Scythians replaced the Cimmerians as the dominant power on the Pontic Steppe in the 8th century BC. In the 7th century BC, the Scythians crossed the Caucasus Mountains and frequently raided West Asia along with the Cimmerians. After being expelled from West Asia by the Medes, the Scythians retreated back into the Pontic Steppe and were gradually conquered by the Sarmatians. In the late 2nd century BC, the capital of the largely Hellenized Scythians at Scythian Neapolis in the Crimea was captured by Mithridates VI and their territories incorporated into the Bosporan Kingdom. By the 3rd century AD, the Sarmatians and last remnants of the Scythians were overwhelmed by the Goths, and by the early Middle Ages, the Scythians and the Sarmatians had been largely assimilated and absorbed by early Slavs. The Scythians were instrumental in the ethnogenesis of the Ossetians, who are believed to be descended from the Alans.

After the Scythians' disappearance, authors of the ancient, mediaeval, and early modern periods used the name "Scythian" to refer to various populations of the steppes unrelated to them.

The Scythians played an important part in the Silk Road, a vast trade network connecting Greece, Persia, India and China, perhaps contributing to the prosperity of those civilisations. Settled metalworkers made portable decorative objects for the Scythians, forming a history of Scythian metalworking. These objects survive mainly in metal, forming a distinctive Scythian art.