List of secret police organizations

The Presidential Guard in Belarus
The FSB (Federal'naya Sluzhba Bezopasnosti), formerly the FSK (Federal'naya Sluzhba Kontr-razvedky), of the Russian Federation, which has been accused of using the tactics of the former KGB
The MSS (Ministry of State Security) in Turkmenistan
The SBU (Sluzhba Bezpeky Ukrayiny) in the Ukraine

The Sigurimi in communist-ruled Albania
The StB (Státní bezpečnost) in communist-ruled Czechoslovakia
The Stasi (Ministerium für Staatssicherheit) in East Germany
The AVO (Allamvedélmi Osztály), succeeded by the AVH (Allamvedélmi Hatosag), in communist-ruled Hungary before the 1956 revolution
The UB (Urzad Bezpieczenstwa), succeeded by the SB (Sluzba Bezpieczenstwa), in communist-ruled Poland
The Securitate (Departamentul Securitatii Statului) in communist-ruled Romania
The Okhranka of Imperial Russia, prior to the Bolshevik Revolution
The secret police of the Soviet Union went though many names and phases
The UDB (Uprava drzavne bezbednosti), succeeded by the SDB (Sluzba drzavne bezbednosti), in communist Yugoslavia under Tito and Slobodan Milosevic

The SRI (Serviciul Roman de Informatii) in Romania, which is considered by some to still use some of the Securitate's methods
The Special Branch of the British police functions as the executive arm of MI5 and cooperates closely with MI6.

The Milice in Vichy France
The Gestapo (Geheime Staatspolizei) in Nazi Germany
The OVRA (Organizzazione di Vigilanza Repressione dell'Antifascismo) in fascist-ruled Italy
The PVDE (Policia de Vigilância e de Defesa do Estado), succeeded by the PIDE (Polícia Internacional e de Defesa do Estado), in Portugal under António de Oliveira Salazar
The DGS (Direcção Geral de Segurança) in Portugal under Marcelo Caetano

VEVAK (Vezarat-e Ettela'at va Amniat-e Keshvar) and the Pasdaran (Revolutionary Guards) in modern Iran
The Mudiriyat al-Amn al-Amma in modern Iraq
Shin Bet (Sherut ha-Bitachon ha-Klali) in Israel

SAVAK (Sazeman-i Ettelaat va Amniyat-i Keshvar) in pre-revolutionary Iran under the Shah
The Mukhabarat in Iraq under Saddam Hussein

KOPKAMTIB (Kommando Operasi Pemulihan Keamanan dan Ketertiba) in Indonesia
The State Safety and Security Agency, previously the State Security Department and State Security Agency, in North Korea
The National Security Service in the Maldives
The MISG (Military Intelligence and Security Group) in the Philippines

The KHAD (Khedemat-e Atla't Dawlati) in Soviet-dominated Afghanistan
The Kempeitai in Imperial Japan
The KCIA (Korea Central Intelligence Agency), succeeded by the ANSP (Agency for National Security Planning), in South Korea. The ANSP still exists, but is no longer regarded as a secret police force.

The SERC (Seccion Especial de Repression del Comunismo) in Argentina before Juan Perón
The DIPA (División de Información Politicas Antidemocráticus) in Argentina under Perón and the subsequent military Junta
The SES (Servicio Especial de Seguridad) in Bolivia
The DOI-CODI (Departamento de Operações Internas-Centro de Operações de Defesa Interna) and SNI (Servicia Nacional de Informações) in Brazil
The DINA (Dirección Nacional de Inteligencia), succeeded by the CNI (Centro Nacional de Información), under Augusto Pinochet's military dictatorship in Chile
The Policía Judicial in Guatemala under Alfredo Enrique Peralta Azurdia
The PMA (Policía Militar Ambulate) and Guardia de Hacienda in Guatemala under Julio César Méndez Montenegro
The ESA (Ejército Secreto Anti-Comunista) and Centro de Servicios Especiales de la Presidencia in Guatemala
The DNI (Departamento Nacional de Investigaciones) in Honduras
The DIPD (División de Investigaciones para la Prevención de la Delincuencia) in Mexico
The DGSE (Dirección General de Seguridad del Estado) in Nicaragua
The División Téchnica de Represión del Comunismo of the DIPC (Departamento de Investigaciones de la Policía) in Paraguay
The Seguridad del Estado and the División Contra el Terrorismo in Peru
The ORDEN (Organización Democrática Nacionalista), succeeded by the FDN (Frente Democrático Nacionalista), in El Salvador
The Organismo Coordinador de Actividades Anti-Subversivas in Uruguay

The VSN (Volontaires de la sécurité nationale), better known as the Ton Ton Macoute, in Haiti under François Duvalier (Papa Doc)
The FBI (Federal Bureau of Investigation) in the United States (especially under the administration of J. Edgar Hoover)

The BMM (Brigade Mixte Mobile) in Cameroon
The USP in the Central African Republic
The DEMIAP (Détection Militaire des Activités Anti-Patrie) in the Democratic Republic of the Congo
The DGSE (Direction Générale de la Sécurité d'Etat) in the Republic of the Congo
The Presidential Investigations Unit in the Cote d'Ivoire
The Brigade Spéciale de Recherche de la Gendarmerie and the SDS (Service de Documentation et de Sécurité) in Djibouti
The CRID (Central Revolutionary Investigation Department) in Ethiopia
The NIA (National Intelligence Agency) in the Gambia
The BNI (Bureau of National Investigations) in Ghana
The SSS (State Security Service) and Special Bodyguard Unit in Nigeria
The CIO (Central Intelligence Organization) in Zimbabwe

The DISA (Direcção de Informação e Segurança de Angola) in MPLA-ruled Angola
The Centre National d'Etude et de Recherche in Cameroon
The DDS (Direction de la Documentation et de la Sécurité) in Chad under Hissène Habré
Koevoet in South African-ruled Namibia
The NSO (Nigerian Security Organisation) in Nigeria under the Buhari regime
The SCR (Service Central de Renseignements) in Rwanda
BOSS (Bureau of State Security) in apartheid South Africa
The Public Safety Unit and the Bureau of State Research in Idi Amin's Uganda

Fictional secret police forces

The Thought Police from George Orwell's Nineteen Eighty-Four
Section 31 from Star Trek - Federation
The Tal Shiar from Star Trek - Romulan secret police
The Obsidian Order from Star Trek - Cardassian secret police
The Cable Street Particulars from the Discworld - Ankh-Morpork secret police (under Captain Swing)
The Nightwatch from Babylon 5 - Earth Alliance secret police
Psi Corps from Babylon 5 - Earth Alliance secret police composed of telepaths, essentially "Thought Police", often working in tandem with the Nightwatch. They possess obvious references to the TV show The Prisoner and the Gestapo, which several characters comment on within the series ("...what are you up to today? Annexing Sudetenland?")
The Inquisition from Warhammer 40,000 - Imperial secret police similar to the Spanish Inquisition
The Finger, the secret police of Norsefire, the fascist government of England, in V for Vendetta