IZ may mean:
- IATA code for Arkia Israel Airlines
- NATO country code and Federal Information Processing Standard 10-4 country code for Iraq
- International zone, a type of extraterritoriality governed by international law
- Invader Zim, an American animated television series
- Inclusionary zoning, a zoning ordinance mandating affordable housing in certain development projects
IZ (or Iz or iZ) may also refer to:
- Jacob Paek, aka "IZ", a Korean American rapper
- IZ (graffiti artist), aka "Iz the Wiz", an American graffiti artist
- Israel "Iz" Kamakawiwoʻole, a Hawaiian musician and singer
- iZ (toy), a musical toy released by Zizzle, L.L.C. in late 2005
- Iž, an island in the Croatian part of the Adriatic Sea