Counterintelligence organizations and agencies attempt to prevent foreign intelligence organizations from successfully gathering and collecting intelligence against the governments they serve.

Currently active counterintelligence organizations include the following. For former agencies, see the separate list below.

Australia

• Australian Security Intelligence Organisation (ASIO)
• Australian Secret Intelligence Service (ASIS)^[1]
• Defence Intelligence Organisation (DIO)

Bangladesh

• National Security Intelligence (NSI)
• Directorate General of Forces Intelligence (DGFI)

Belarus

• State Security Committee of the Republic of Belarus

Belgium

• General Intelligence and Security Service (GISS)
• Veiligheid van de Staat - Sûreté de l'Etat (VSSE)

Brazil

• Agência Brasileira de Inteligência (ABIN)
• Gabinete de Segurança Institucional da Presidência da República (GSI)

Brunei

• Jabatan Keselamatan Dalam Negeri (JKDN)

Canada

• Canadian Security Intelligence Service (CSIS)
• Canadian Forces National Counter-Intelligence Unit (CFNCIU),operated by the Canadian Forces Military Police Group^[2]

Croatia

• Security and Intelligence Agency (SOA)
• Military Security and Intelligence Agency (VSOA)

Czech Republic

• Bezpečnostní informační služba (BIS) — Security Information Service^[3]

Denmark

• Politiets Efterretningstjeneste (PET)

Estonia

• Estonian Internal Security Service (KaPo)

Finland

• Finnish Security Intelligence Service (SuPo)

France

• Directorate-General for External Security (DGSE)
• Directorate-General for Internal Security (DGSI)
• Directorate of Military Intelligence (DRM)
• DRSD

Germany

• Bundesamt für Verfassungsschutz (BfV)
• Bundesnachrichtendienst (BND)
• Militärischer Abschirmdienst (MAD)

Greece

• Hellenic National Intelligence Service^[4] (NIS-EYP) Sub-Directorate for International Terrorism and Organized Crime^[5]

Hungary

• Constitution Protection Office (Hungary) (NBH)^[6]

Iceland

• Greiningardeild Ríkislögreglustjóra - National Security Unit

India

• Central Bureau of Investigation (CBI)
• Directorate of Air Intelligence (A.I.)
• Directorate of Military Intelligence (M.I.)
• Directorate of Naval Intelligence (N.I.)
• Directorate of Revenue Intelligence (DRI)
• Intelligence Bureau (IB)
• Research and Analysis Wing (RAW)

Indonesia

• Badan Intelijen Negara (BIN)
• Kejaksaan Agung Republik Indonesia (KARI)
• Pusat Intelijen TNI Angkatan Darat abbreviated (Pusintelad)

Iran

• Ministry of Intelligence and National Security of Iran

Ireland

• Crime and Security Branch (CSB)
• G2

Israel

• Aman
• Mossad
• Shin Bet (official name is Shabak)

Italy

• Department of Information for Security (DIS)
• External Intelligence and Security Agency (AISE)
• Joint Intelligence Centre (CII)

Japan

• National Police Agency Security Bureau (警察庁警備局, Keisatsu-chō Keibi-kyoku), commonly known as "ja:公安警察, Kōan-Keisatsu, which means "public security police"" or shortly "公安, Kōan" in Japan.
• Public Security Intelligence Agency (公安調査庁, Kōanchōsa-chō)^[7]
• SDF Intelligence Security Command (自衛隊情報保全隊 Jieitai Jōhō-Hozentai)

Kenya

• National Security Intelligence Service (NSIS)^[8]

Lebanon

• Special Agency to Combat Terrorism^[9]

Malaysia

• Bahagian Penyelidikan Jabatan Perdana Menteri (BPJPM)
• Pertubuhan Perisikan Pertahanan Malaysia (PPPM)

Myanmar

• Bureau of Special Investigation (BSI)
• Office of the Chief of Military Security Affairs (OCMSA)

Netherlands

• Algemene Inlichtingen- en Veiligheidsdienst (AIVD) — General Intelligence and Security Service
• Militaire Inlichtingen- en Veiligheidsdienst (MIVD) — Military Intelligence and Security Service

New Zealand

• Directorate of Defence Intelligence and Security (DDIS)
• New Zealand Security Intelligence Service (NZSIS)
• Threat Assessment Unit (TAU)

North Korea

• Reconnaissance General Bureau (RGB)

Pakistan

• Directorate General Air Intelligence (AI)
• Directorate-General for the Naval Intelligence (NI)
• Intelligence Bureau (IB)
• Inter-Services Intelligence (ISI)
• Pakistan Army Corps of Military Intelligence (MI)

Philippines

• 300th Air Intelligence and Security Wing (300th AISW)
• Army Intelligence Regiment (AIR)
• National Intelligence Coordinating Agency (NICA)
• Naval Intelligence and Security Force (NISF)

Poland

• Internal Security Agency (ABW)
• Military Counterintelligence Service (SKW)

Portugal

• Military Security and Informations Center (CISMIL)
• Informations System of the Portuguese Republic (SIRP)

Romania

• Serviciul Român de Informaţii (SRI)
• Directorate for Military Security

Russian Federation

• Federal Security Service (FSB)
• Foreign Intelligence Service (SVR)
• Main Directorate of the General Staff of the Armed Forces of the Russian Federation (GRU)

Serbia

• Bezbednosno-informativna agencija (BIA)
• Vojnobezbednosna agencija (VBA), Military Security Agency (successor of Yugoslav Kontraobaveštajna služba)

Sweden

• Militära underrättelse- och säkerhetstjänsten (MUST) — Military Intelligence and Security Service
• Säkerhetspolisen (SÄPO) — Swedish Security Service

Switzerland

• Federal Office of Police — in German, Bundesamt für Polizei (BAP); in French, Office fédéral de la police; in Italian, Ufficio federale di polizia^[10]

Slovakia

• Národný bezpečnostný úrad (NBÚ) — National Security Bureau

South Africa

• Defence Intelligence Division (DID)
• National Intelligence Agency (NIA)
• State Security Agency (SSA)
• South African Secret Service (SASS)

South Korea

• Defense Counterintelligence Command (DCC)
• Defense Intelligence Agency (DIA)
• Naval Intelligence Group (NIG)
• National Intelligence Service (NIS)
• National Police Agency Intelligence Bureau (IB)

Thailand

• Armed Forces Security Center (AFSC)
• Army Military Intelligence Command (AMIC)
• Directorate of Joint Intelligence (DJI)
• Internal Security Affairs Bureau (ISAB)
• National Intelligence Agency (NIA)
• Naval Intelligence Department (NID)
• Royal Thai Air Force Directorate of Intelligence (DI)
• Royal Thai Police Special Branch Bureau (SBB)

Turkey

• Donanma İstihbarat Dairesi (DİD)
• Hava Kuvvetleri İstihbarat Dairesi (HKİD)
• Higher Counterterrorism Council^[11]
• Jandarma İstihbarat Müdürlüğü (JİM)
• Millî İstihbarat Teşkilatı (MIT)
• Ordu İstihbarat Dairesi (OİD)

Ukraine

• Foreign Intelligence Service of Ukraine (SZRU)
• HUR MO
• Security Service of Ukraine (SBU)

United Kingdom

• Counter Intelligence Operations Squadron (CIOS)
• Defence Intelligence (DI)
• Security Service, commonly known as MI5
• National Domestic Extremism and Disorder Intelligence Unit (NDEDIU)
• Secret Intelligence Service, also known as MI6

United States

• FBI Counterintelligence Division (FBI)
• United States Army Counterintelligence (ACI)
• Air Force Office of Special Investigations (AFOSI)
• DIA's Defense Counterintelligence and Human Intelligence Center (DCHC)
• Diplomatic Security Service (DSS), U.S. Department of State (DS/ICI/CI)
• Naval Criminal Investigative Service (NCIS, formerly NIS)
• United States Marine Corps Counterintelligence
• Office of the National Counterintelligence Executive (ONCIX)
• Central Intelligence Agency (CIA)
• National Security Agency (NSA)

Vietnam

• General Department of Defence Intelligence (GDDI)

These organizations are now defunct, possibly absorbed by a successor organization:

Ireland

• Army Intelligence Department
• Criminal Investigation Department (CID)

Nazi Germany

• Geheime Staatspolizei (Gestapo)
• Geheime Feldpolizei (GFP) (Secret Field Police) (1939-1945)
• Sicherheitsdienst — Security Service of the SS, particularly the "inland SS" branch
• Abwehr (military intelligence)

Empire of Japan

• Kenpeitai - Army military police
• Tokubetsu Keisatsutai - Navy military police
• Tokubetsu Kōtō Keisatsu (特別高等警察, Special Higher Police) - civil police

Poland

• Wojskowe Służby Informacyjne (WSI) — dissolved in 2006 for having been involved in illegal activities

Yugoslavia

• Kontraobaveštajna služba (KOS), Army Counter-Intelligence Service
• Uprava Državne Bezbednosti (UDBA), State Security Directorate

Soviet Union and Imperial Russia

• Committee for State Security (KGB) — previously MGB, NKVD, OGPU, Cheka, and, during imperial times, Okhrana
• SMERSH

South Korea

• Defense Security Command— dissolved in 2018

Ukraine

• Kontrrazvedka, Makhnovist counterintelligence agency

United Kingdom

• 14 Intelligence Company — also known as "the Det"

United States

• Army Counter Intelligence Corps
• Counterintelligence Field Activity