UGT may mean:
- União Geral de Trabalhadores, the General Union of Workers (Portugal)
- Unión General de Trabajadores, the General Workers' Union (Argentina)
- Unión General de Trabajadores, the General Union of Workers of Spain.
- Universal Greeting Time, used in IRC channels.
- Uridinediphosphate-glucuronosyltransferase, a class of enzymes including UGT2B7, UGT1, and UGT1A1.