Dalet (dāleth, also spelled Daleth or Daled) is the fourth letter of many Semitic alphabets, including Phoenician, Aramaic, Hebrew ד, Syriac ܕ and Arabic dāl ﺩ (in abjadi order; 8th in modern order). Its sound value is a voiced alveolar plosive ([d]).

The letter is based on a glyph of the Middle Bronze Age alphabets, probably called dalt "door" (door in Modern Hebrew is delet), ultimately based on a hieroglyph depicting a door,

The Phoenician letter gave rise to the Greek delta (Δ), Latin D and the equivalent in the Cyrillic Д.