Country
United States
Sixteen-agency intelligence community overseen by the Director of National Intelligence, built around a foreign/domestic split.
The United States Intelligence Community (IC) is a federation of sixteen separate organizations under the Director of National Intelligence (DNI), a coordinating role created in 2004 after the 9/11 Commission identified failures of inter-agency information sharing.
The structure rests on a long-standing foreign/domestic split: the Central Intelligence Agency operates exclusively abroad and is barred from domestic intelligence collection, while the Federal Bureau of Investigation handles domestic security and counterintelligence inside the United States. Signals intelligence is centralized at the National Security Agency. Military services run their own intelligence components — the Defense Intelligence Agency at the Department of Defense level, plus dedicated services for each of the armed forces.
US intelligence operates under a denser body of statutory and judicial oversight than most peer democracies, including the Foreign Intelligence Surveillance Court, the Senate Select Committee on Intelligence, and the House Permanent Select Committee on Intelligence. The history of that oversight, and the recurring pattern of agencies operating beyond it, is the substance of these pages.
Central Intelligence Agency
The principal foreign human-intelligence and covert-action service of the United States, created in 1947 as successor to the wartime Office of Strategic Services.
Defense Intelligence Agency
The Department of Defense's foreign military-intelligence and all-source analytical service, supporting US combatant commands and the Joint Staff.
Department of Homeland Security
The cabinet department created in 2002 to consolidate US domestic-security functions; its Office of Intelligence and Analysis is the department's Intelligence Community member.
Federal Bureau of Investigation
The principal domestic intelligence and federal law-enforcement agency of the United States, with statutory authority for counterintelligence, counter-terrorism, and federal criminal investigation.
National Geospatial-Intelligence Agency
The United States agency responsible for the collection, analysis, and dissemination of geospatial intelligence, including imagery and mapping for both military operations and national policy.
National Reconnaissance Office
The United States agency responsible for the design, construction, launch, and operation of intelligence-collection satellites. The Agency's existence was officially classified until 1992.
National Security Agency
The signals-intelligence and information-security agency of the United States, established in 1952 by classified executive order and disclosed publicly only in 1957.
Office of Naval Intelligence
The intelligence service of the United States Navy and the oldest continuously operating intelligence service of the United States Government, established by General Order No. 292 in 1882.
Office of the Director of National Intelligence
The United States office created in 2004 to head the Intelligence Community, set its priorities, integrate its products, and manage the National Intelligence Program budget. The Director of National Intelligence is the President's principal intelligence adviser.
Transportation Security Administration
The US transportation-security agency, established in 2001 in response to the 9/11 attacks; responsible for passenger and baggage screening at US airports and broader transportation-system security.
United States Army Intelligence and Security Command
The United States Army's principal intelligence command, conducting signals, human, counter-intelligence, and information-operations missions in support of Army and theatre commanders worldwide.
United States Cyber Command
The United States unified combatant command responsible for the conduct of military cyber operations. The Commander of US Cyber Command is dual-hatted as the Director of the National Security Agency.
How to read a country page
This is the institutional landscape of United States's intelligence apparatus as it is documented in the public record. Each card above links through to a full agency profile — the service's founding date, statutory basis, jurisdiction, parent ministry, headquarters, official channels, and a structured account of role, history, and notable operations footnoted to primary sources. The agencies on this page may overlap institutionally (a foreign-intelligence service and a signals-intelligence service often share missions and personnel) and may operate against one another in counter-intelligence terms; the country page does not impose a hierarchy among them, only an inventory.
If a particular operation or scandal is what you are looking for rather than the institutional background, see the Dossiers — long-form pieces that cross agencies and countries. The methodology page documents how operations are categorised as confirmed, alleged, or disputed, and what the public record can and cannot tell us. The Lexicon defines the terms that recur across these pages — HUMINT, SIGINT, covert action, plausible deniability, station, asset, finding.
Coverage here grows as new declassifications expand what can responsibly be said about services that remain partly closed. Some agencies have full reference entries; others are stub entries pending the full treatment. Stubs are kept on the index so navigation between related services is preserved while the detailed text is written.