Committee for State Security may refer to:

• KGB, aka. Committee for State Security (Soviet Union), the secret service of the Soviet Union from 1954 to 1991
• Committee for State Security (Bulgaria), the former secret service of the People's Republic of Bulgaria
• Committee for State Security (Ukraine), the former secret service of the Ukrainian Soviet Socialist Republic
• State Security Committee of the Republic of Belarus
  • Committee for State Security of the Byelorussian Soviet Socialist Republic