UST
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
- 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