Avestan geography refers to the investigation of place names in the Avesta and the attempt to connect them to real-world geographical sites. It is connected to but different from the cosmogony expressed in the Avesta, where place names primarily refer to mythical events or a cosmological order.
Identifying such connections is important for localizing the people of the Avesta and is therefore crucial for understanding the early history of Zoroastrianism and the Iranians. Sources for such geographical references are exclusively found in the younger Avestan portion of the text, in particular in the Vendidad and several of the Yashts. The identification of these Avestan place names with real locations is often supported by comparisons with references made in later Iranian sources.