UNS can mean:
- Unified Special, a Unified Thread Standard
- Unnilseptium (Uns), is the former name of the chemical element Bohrium (Bh), element 107
- Unified numbering system, used to identify alloys
- Uniform national swing, a system for predicting parliamentary seats in first past the post elections
- Unión Nacional Sinarquista, a Mexican political movement
- Universal Night Sight, a weapon mounted night vision device
- University of Novi Sad, a university in Novi Sad, Vojvodina, Serbia
- National University of the South, a university in Argentina
- State University of Surakarta (Universitas Negeri Surakarta), a university in Indonesia
- University of Natural Sciences (Ho Chi Minh City)
- Naruto: Ultimate Ninja Storm, a 2008 video game for the PlayStation 3.
- Uns (album)