Edom ( /ˈiː.dʌm/; Hebrew: אֱדוֹם, Modern Edom Tiberian ʼĔḏôm ; "red"; Assyrian: Udumi; Syriac: ܐܕܘܡ) or Idumea (Greek: Ἰδουμαία, Idoumaía; Latin: Idūmaea) was a Semitic inhabited historical region of the Southern Levant located south of Judea and the Dead Sea. It is mentioned in biblical records as a 1st millennium BC Iron Age kingdom of Edom, and in classical antiquity the cognate name Idumea was used to refer to a smaller area in the same region. The name Edom means "red" in Hebrew, and was given to Esau once he ate the "red pottage". (Genesis 25:30 KJV)

The Bible and The Torah describe the Edomites as descendants of Esau the eldest son of the Jewish patriarch Isaac, although no written records of the time have been discovered that support this claim.

The Edomites may have been connected with the Shasu and Shutu, nomadic raiders mentioned in Egyptian sources. Indeed, a letter from an Egyptian scribe at a border fortress in the Wadi Tumilat during the reign of Merneptah reports movement of nomadic "shasu-tribes of Edom" to watering holes in Egyptian territory. The earliest Iron Age settlements—possibly copper mining camps—date to the 9th century BCE. Settlement intensified by the late 8th century BC and the main sites so far excavated have been dated between the 8th and 6th centuries BC. The last unambiguous reference to Edom is an Assyrian inscription of 667 BC; it has thus been unclear when, how and why Edom ceased to exist as a state, although many scholars point to scriptural references in the Bible, specifically the historical book of Obadiah, to explain this phenomenon.