A

• Defunct Afghan intelligence agencies (4 P)
• Defunct Argentine intelligence agencies (4 P)
• Defunct Austrian intelligence agencies (1 P)
• Defunct Azeri intelligence agencies (1 P)

C

• Defunct Canadian intelligence agencies (2 P)
• Defunct Chilean intelligence agencies (1 C, 3 P)

D

• Defunct Chinese intelligence agencies (7 P)

F

• Defunct Finnish intelligence agencies (1 P)
• Defunct French intelligence agencies (1 C, 10 P)

G

• Defunct German intelligence agencies (3 C, 4 P)

H

• Defunct Hungarian intelligence agencies (3 P)

I

• Defunct Indonesian intelligence agencies (1 P)
• Defunct Iranian intelligence agencies (1 C, 4 P)
• Defunct Iraqi intelligence agencies (1 C, 5 P)

J

• Defunct Japanese intelligence agencies (11 P)

M

• Defunct Malaysian intelligence agencies (1 P)

P

• Defunct Polish intelligence agencies (2 C, 13 P)
• Defunct Portuguese intelligence agencies (3 P)

R

• Defunct Romanian intelligence agencies (2 C, 3 P)
• Secret services of the Russian Empire (2 C)

S

• Defunct Serbian intelligence agencies (1 P)
• Defunct South African intelligence agencies (8 P)
• Soviet intelligence agencies (7 C, 21 P)
• Defunct Spanish intelligence agencies (3 P)
• Defunct Swedish intelligence agencies (3 P)
• Defunct Swiss intelligence agencies (3 P)

U

• Defunct Ugandan intelligence agencies (2 P)
• Defunct Ukrainian intelligence agencies (4 P)
• Defunct United Kingdom intelligence agencies (2 C, 34 P)
• Defunct United States intelligence agencies (2 C, 35 P)

V

• Defunct Venezuelan intelligence agencies (5 P)
• Defunct Vietnamese intelligence agencies (1 C)

Y

• Yugoslav intelligence agencies (6 P)

• List of defunct intelligence agencies
• List of historical secret police organizations

A

• Agentes in rebus
• Areani

B

• Barid
• Bureau for the Repression of Communist Activities
• Bureau of Barbarians

C

• Korean Central Intelligence Agency
• Cheka
• Chronology of Soviet secret police agencies
• Committee for State Security (Bulgaria)

D

• Dirección Federal de Seguridad
• Directorate of Information and Security of Angola
• DOI-CODI

E

• Eastern Depot

F

• Frumentarii

G

• Politieke Inlichtingendienst

H

• Hangash

J

• Joint State Political Directorate

K

• Karakol society

M

• Main Directorate of State Security
• Ministry of National Security (Czechoslovakia)

N

• National Intelligence Service (Peru)
• National Security Service (Somalia)
• Netherlands East Indies Forces Intelligence Service

O

• Nationalist Democratic Organization

S

• Santebal
• Confederate Secret Service
• Servicio de Inteligencia Militar
• Servizio Informazioni Militare
• Servizio Informazioni Segrete
• Sigurimi
• Special Organization (Ottoman Empire)
• State Security Investigations Service
• StB

U

• Umur-u Hafiye