UST or Ust may refer to:
Organizations UST (company), American digital technology company Equatorial Guinea Workers' Union Union of Trade Unions of Chad (Union des Syndicats du Tchad) United States Television Manufacturing Corp. UST Growling Tigers, men's varsity team UST Inc., tobacco company
Universities University of Science and Technology (disambiguation) Hong Kong University of Science and Technology (HKUST) Korea University of Science and Technology in South Korea University of Santo Tomas in Manila, Philippines University of St. Thomas (Minnesota) University of St. Thomas (Texas) in Houston, US
Places Northeast Florida Regional Airport, St. Augustine, US, IATA Code Oskemen, Kazakhstan: Ust-Kamenogorsk in Russian Qala Wust or Ūst, Badakhshan Province, Afghanistan Ust-Luga, near Luga Bay of the Gulf of Finland
Other uses United States Treaties and Other International Agreements Universal System Tubeless, a tubeless tire rim patented by Mavic Underground storage tank United States Treasury security, a bond issued by the federal government Unsepttrium, an unsynthesized chemical element .ust, file extension for Utau project files Ultimate Success Today, 2020 Protomartyr album TerraUSD (by ticker symbol), a stablecoin cryptocurrency developed by Do Kwon