Tiu

Tiu may refer to:
 * Tiu (pharaoh) (4th millennium BC), predynastic Pharaoh of Lower Egypt
 * Týr, as the Old English name for the Sky-God of Norse (Germanic) Mythology
 * Tiu, the Babylonian fiend of headache
 * Ţiu, a village in Cernăteşti Commune, Dolj County, Romania

a surname:
 * Chris Tiu, a Filipino basketball player
 * a variant of the Chinese family name Teoh
 * The Filipino version of the Chinese surname Zhang

TIU may refer to:
 * Richard Pearse Airport (IATA code: TIU)
 * Tennis Integrity Unit
 * Techno India University
 * Tishk International University
 * Tokyo International University
 * Trinity International University
 * Tsukuba International University