Danu is an ancient Scythian word meaning "river". The commonly proposed etymology of the names of the Danube River, Dnieper River, Dniester River, Don River, and Donets River.

Danu may also refer to:

Mythology Danu (Indo European) a water goddess in the Indo-European religion Danu (Irish goddess), reconstructed mother goddess of the Tuatha De Danann (Old Irish: "The peoples of the goddess Danu") Danu (Asura), an Asura and Hindu primordial goddess of primeval waters Dewi Danu, a Balinese Hindu water goddess

People Danu Innasithamby, a Sri Lankan media personality Danu people, an ethnic group in Myanmar

Places Iran

Moldova Danu, Glodeni, a commune in Glodeni district, Moldova

Myanmar Danu language, a Burmish language in Myanmar

Popular culture Danú, an Irish folk music group The fictitious island setting of Timothy Mo's novel, The Redundancy of Courage based on the real-life nation of East Timor

Acronym DANU Doclean Academy of Sciences and Arts, with the native acronym DANU