UGG can refer to:

  • UGG, a brand of footwear, bags, clothing and additional goods
  • Ugg boots, a style of sheepskin boot that originated in Australia and New Zealand
  • Deckers Outdoor Corporation, trading as UGG Australia
  • United Grain Growers, a Canadian grain distributor that merged with Agricore in 2001
  • Tryptophan, an essential amino acid in the human diet (mRNA genetic code)