FTS is a three-letter acronym that may refer to:
- First trimester screening, a prenatal test aimed to detect diseases or conditions in a fetus or embryo
- Fleet Telematics System, a naval communication system
- Fischer-Tropsch synthesis, a collection of chemical reactions that converts a mixture of carbon monoxide and hydrogen into liquid hydrocarbons
- Flying Training School, a training establishment for military aviators
- Follow-the-sun, a type of global workflow
- Fourier transform spectroscopy, a measurement technique
- Fox Television Stations, a group of United States television stations
- Fox Television Studios, a U.S. television production company
- Friends of Tribals Society, a volunteer organization in India
- Fellow of the Theosophical Society, a title
- Full text search, a technique for searching a computer-stored document or database
- File Transfer Service, or File hosting service
- It is city code for Fatehpur Sikri.