Federation Security Agency
- Civilian investigatory and defensive body for the United Federation of Planets (Star Trek III: The Search for Spock; TNG Novel: Available Light)
- Manages internal Federation security (Star Trek III: The Search for Spock; TNG Novel: Available Light)
- Facilities
- FSA detention facility, San Francisco, United States of America, Earth (TNG Novel: Available Light)
- Penal colony, New Zealand, Earth
- Membership
- Members referred to with the title of Officer (TNG Novel: Available Light)
- Black berets emblazoned with the UFP emblem, gray uniforms with a high collar (TOS Novel: Ex Machina; Star Trek III: The Search for Spock; TNG Novel: Available Light)