The Siloam inscription or Shiloah inscription, known as KAI 189, is a Hebrew inscription found in the Siloam tunnel which brings water from the Gihon Spring to the Pool of Siloam, located in the City of David in East Jerusalem neighborhood of Silwan. The inscription records the construction of the tunnel, which has been dated to the 8th century BC on the basis of the writing style. It is the only known ancient inscription from ancient Israel and Judah which commemorates a public construction work, despite such inscriptions being commonplace in Egyptian and Mesopotamian archaeology.

Kanaanäische und Aramäische Inschriften, or KAI, is the standard source for the original text of Canaanite and Aramaic inscriptions not contained in the Hebrew Bible.