Teth, also written as Ṭēth or Tet, is the ninth letter of the Semitic abjads, including Phoenician Ṭēt Phoenician teth.svg, Hebrew Ṭēt ט, Aramaic Ṭēth Teth.svg, Syriac Ṭēṯ ܛ, and Arabic Ṭāʾ ط. It is 16th in modern Arabic order. The Persian Ța is pronounced as a hard "t" sound and is the 19th letter in the modern Persian alphabet. The Phoenician letter also gave rise to the Greek theta (Θ), originally an aspirated voiceless alveolar stop but now used for the voiceless dental fricative.

The sound value of Teth is /tˤ/, one of the Semitic emphatic consonants.