The Indo-Aryan languages (within the context of Indo-European studies also Indic) constitutes a branch of the Indo-Iranian languages, itself a branch of the Indo-European language family. Indo-Aryan speakers form about one half (approx 1.5 billion) of all Indo-European speakers (approx 3 billion), also Indo-Aryan has more than half of all recognized Indo-European languages, according to Ethnologue.

The largest in terms of native speakers being Hindustani (Hindi-Urdu) (about 240 million), Bengali (about 230 million), Punjabi (about 90 million), Marathi (about 70 million), Gujarati (about 45 million), Oriya (about 30 million), Sindhi (about 20 million), Saraiki (about 18 million), Nepali (about 14 million), Sinhala (about 16 million), and Assamese (about 13 million) with a total number of native speakers of more than 900 million. They form a subgroup of the Indo-Iranian languages, which consists of two other language groups: the Iranian and Nuristani.

The earliest evidence of the group is from Vedic Sanskrit, the language used in the ancient preserved texts of the Indian subcontinent, the foundational canon of Hinduism known as the Vedas. The Indo-Aryan superstrate in Mitanni is of similar age as the Rigveda (and almost identical to it), but the only evidence is a number of loanwords.

Old or OLD may refer to: