State Security Service
State Security Service may refer to:

 State Security Service of Abkhazia
 State Security Service (Azerbaijan)
 State Security Service (Belgium)
 State Security Service of East Germany, most commonly known as Stasi
 State Security Service of Georgia
 State Security Service (Kazakhstan)
 State Security Service (Nigeria)
 State Security Service (Uzbekistan)
 Directorate for State Security (Yugoslavia) (1946–1991), the Yugoslav secret police organization
 State Security Directorate (Serbia) (1991–2002), the security agency of the Federal Republic of Yugoslavia

See also
 State Security (disambiguation)
 Committee for State Security (disambiguation)
 Ministry for State Security (disambiguation)
 State Security Agency (disambiguation)
 State Intelligence Service (disambiguation)
 State Intelligence Agency (disambiguation)