Eastern Iranian languages

The Eastern Iranian languages or Eastern Iranic languages are an areal subgroup of the Iranian languages, having emerged during the Middle Iranian era (4th century BC to 9th century AD). The Avestan language is often classified as early Eastern Iranian. As opposed to the Middle-era Western Iranian dialects, the Middle-era Eastern Iranian dialects preserve word-final syllables.

The largest living Eastern Iranian language is Pashto, with 40 to 60 million speakers between the Amu River in Afghanistan and the Indus River in Pakistan. The second-largest living Eastern Iranian language is Ossetic, with roughly 600,000 speakers across Ossetia (split between Georgia and Russia). All other languages of the Eastern Iranian subgroup have fewer than 200,000 speakers combined.

Most living Eastern Iranian languages are spoken in a contiguous area: southern and eastern Afghanistan and the adjacent parts of western Pakistan; the Badakhshan Mountainous Autonomous Region in eastern Tajikistan; and the westernmost parts of Xinjiang Uyghur Autonomous Region in western China. There are also two living members in widely separated areas: the Yaghnobi language of northwestern Tajikistan (descended from Sogdian); and the Ossetic language of the Caucasus (descended from Scytho-Sarmatian and is hence classified as Eastern Iranian despite its location). These are remnants of a vast ethno-linguistic continuum that stretched over most of Central Asia, parts of the Caucasus, Eastern Europe, and Western Asia in the 1st millennium BC — an area otherwise known as Scythia. The large Eastern Iranian continuum in Eastern Europe would continue up to the 4th century AD, with the successors of the Scythians, namely the Sarmatians.