U5
- 5U (disambiguation)
- Aiways U5
- Beijing U5
- German submarine U-5
- Haplogroup U
- Karinou Airlines
- Luxgen U5
- Munich U-Bahn
- SM U-5 (Austria-Hungary)
- SM U-5 (Germany)
- SkyUp Airlines
- U-5-class submarine (Austria-Hungary)
- U5 (Berlin U-Bahn)
- U5 spliceosomal RNA
- US (disambiguation)
- USA3000 Airlines
- Utah State Route 5 (disambiguation)
- X5 Music Group