UUN, Uun, or uun can refer to:
- Urine urea nitrogen, a medical test that measures urea in urine
- Another name for darmstadtium, a transactinide chemical element
- Baruun-Urt Airport, an airport located in Baruun-Urt, Mongolia, by IATA code
- Pazeh language, an extinct language formerly spoken in Taiwan, by ISO 639 code
- "Universal User Name"; see List of computing and IT abbreviations
This disambiguation page lists articles associated with the title UUN.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: