NWO may refer to:
- Dutch Research Council, the national research council of the Netherlands
- New World Order
- New World Order (conspiracy theory), a conspiracy theory referring to the emergence of a totalitarian one world government
- New World Order (professional wrestling), professional wrestling stable (most often stylized as nWo)
- New world order (politics), any period of history evidencing a dramatic change in world political thought and the balance of power
- New world order (Baháʼí), teachings in the Baháʼí Faith pertaining to a world federal system of government.
- New Worlds Observer, orbital telescope system
- New World Orphans, album by Hed PE
- "N.W.O." (song), 1992 song by Ministry
- WWE No Way Out, professional wrestling event