ONW may refer to:
- Operation Northern Watch, military operation in Iraq following the first Gulf War
- Olathe Northwest High School, Olathe, Kansas
- The ISO 639-3 code for the Old Nubian language
- Oudnederlands Woordenboek, dictionary of the Old Dutch language - see List of dictionaries by number of words
This disambiguation page lists articles associated with the title ONW.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: