The Janapadas (pronounced [dʒənəpəd̪ə]) were the realms, republics and kingdoms of the Vedic period on the Indian subcontinent — late Bronze Age into the Iron Age — from about 1200 BCE to the 6th century BCE. Concluding with the rise of sixteen Mahajanapadas ("great janapadas"), most of the states were later annexed by more powerful neighbours, whilst others remained independent.
The Sanskrit term janapada is a tatpurusha compound term, composed of two words: janas and pada. Jana means "people" or "subject" (cf. Latin cognate genus, English cognate kin). The word pada means "foot" (cf. Latin cognate pedis); from its earliest attestation, the word has had a double meaning of "realm, territory" and "subject population". Linguist George Dunkel compares the Greek andrapodon "slave", to PIE *pédom "fetters" (i.e. "what is attached to the feet"). Sanskrit padám, usually taken to mean "footprint, trail", diverges in accent from the PIE reconstruction. For the sense of "population of the land", padasya janas, the inverted padajana would be expected. A primary meaning of "place of the people", janasya padam, would not explain why the compound is of masculine gender. An original dvandva "land and people" is conceivable, but a dual inflection would be expected.
Literary evidence suggests that the janapadas flourished between 1500 BCE and 500 BCE. The earliest mention of the term "janapada" occurs in the Aitareya (8.14.4) and Shatapatha (13.4.2.17) Brahmana texts.