Tanis (Ancient Greek: Τάνις; Egyptian: Djanet; Arabic: صان الحجر‎‎ Ṣān al-Ḥagar) is a city in the north-eastern Nile Delta of Egypt. It is located on the Tanitic branch of the Nile which has long since silted up.

Tanis served as a parallel religious center to Thebes in the Third Intermediate Period. No archaeological evidence from it pre-dates the reign of Psusennes I (1039-991 BC, 21st Dynasty), but many scholars think it originated in the late New Kingdom. Tanis's creation was most likely due to the silting up of the Nile branch that ran by Pi-Ramesses, which forced people to seek another area with access to water. Later on, Tanis would become known as Thebes of Lower Egypt.

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