Idalion or Idalium (Greek: Ιδάλιον, Idalion, Phoenician: 𐤀𐤃𐤉𐤋, ʾDYL, Akkadian: e-di-ʾi-il, Edīl) was an ancient city in Cyprus, in modern Dali, Nicosia District. The city was founded on the copper trade in the 3rd millennium BC. Its name does not appear on the Sargon Stele of 707 BC, but does appear on the later Prism of Esarhaddon (copies of the text dated to 673–672 BC) and in similar spellings in Ashurbanipal's annal (648/647 BC).
Recent excavations have uncovered major buildings on the site which are open to visitors. A new museum is at the entrance of the site.