FSD may refer to:
Places
- Faisalabad, Pakistan
- Sioux Falls Regional Airport, in South Dakota, US (IATA code FSD)
Education
- Ferndale School District, Washington
- Florida School for the Deaf, St. Augustine, Florida
- Framwellgate School Durham, England
- Frankenmuth School District, Michigan
- Fremont School District (disambiguation)
- French School of Detroit, Michigan
- Filer School District, Idaho; See Filer High School
- Fellowship in Sports dentistry - Indian Dental Association
Organisations
- Florida State, Department, the state department for Florida, USA
- Foundation For Sustainable Development
- Freedom Service Dogs, an American animal rescue
- Hong Kong Fire Services Department
- Swiss Foundation for Mine Action (Fondation Suisse de déminage)
Science and technology
Computing
- File system driver
- Free Software Directory / The Free Software Definition
- Full self-driving, prospective capability of Tesla, Inc.'s electric vehicles
- Functional specifications document
Other uses in science and technology
- Female sexual dysfunction
- Fourteen-segment display
- Flame supervision device
- Full scale deflection, the maximum amount the pointer of an analog meter can be deflected
- Free Shipping Day
Other uses
- Dirección Federal de Seguridad, or, in English, the Federal Security Directorate
- Florida Shorebird Database
- Fox Sports Detroit
- Free Software Daily, a website
- Forensic Science Division, or Forensic Science Department