UHT is ultra-high-temperature processing (or ultra heat treatment), used to sterilize milk.
UHT or Uht may also refer to:
- Unhextrium, chemical element 163, symbol Uht
- Ultra-high-temperature metamorphism in geology
- United Hebrew Trades, New York, US, 1880s
- Unterstützungshubschrauber Tiger, a variant of Eurocopter Tiger
- The Ukrainian Heraldry Society (Ukrayinske Heraldychne Tovarystvo)