A listing of all Operational and Support Components with websites or webpages on DHS.gov that currently make up the Department of Homeland Security.
United States Citizenship and Immigration Services (USCIS) secures America’s promise as a nation of immigrants by providing accurate and useful information to our customers, granting immigration and citizenship benefits, promoting an awareness and understanding of citizenship, and ensuring the integrity of our immigration system.
United States Customs and Border Protection (CBP) is one of the Department of Homeland Security’s largest and most complex components, with a priority mission of keeping terrorists and their weapons out of the U.S. It also has a responsibility for securing and facilitating trade and travel while enforcing hundreds of U.S. regulations, including immigration and drug laws.
The United States Coast Guard is one of the five armed forces of the United States and the only military organization within the Department of Homeland Security. The Coast Guard protects the maritime economy and the environment, defends our maritime borders, and saves those in peril.
The Federal Emergency Management Agency (FEMA) supports our citizens and first responders to ensure that as a nation we work together to build, sustain, and improve our capability to prepare for, protect against, respond to, recover from, and mitigate all hazards.
The Federal Law Enforcement Training Center provides career-long training to law enforcement professionals to help them fulfill their responsibilities safely and proficiently.
United States Immigration and Customs Enforcement (ICE) promotes homeland security and public safety through the criminal and civil enforcement of federal laws governing border control, customs, trade, and immigration.
The Transportation Security Administration (TSA) protects the nation's transportation systems to ensure freedom of movement for people and commerce.
The United States Secret Service (USSS) safeguards the nation's financial infrastructure and payment systems to preserve the integrity of the economy, and protects national leaders, visiting heads of state and government, designated sites, and National Special Security Events.
The Directorate for Management is responsible for budget, appropriations, expenditure of funds, accounting and finance; procurement; human resources and personnel; information technology systems; facilities, property, equipment, and other material resources; and identification and tracking of performance measurements relating to the responsibilities of the Department.
The goal of the National Protection and Programs Directorate is to advance the Department's risk-reduction mission. Reducing risk requires an integrated approach that encompasses both physical and virtual threats and their associated human elements.
The Science and Technology Directorate is the primary research and development arm of the Department. It provides federal, state and local officials with the technology and capabilities to protect the homeland.
The mission of the The Domestic Nuclear Detection Office is to prevent nuclear terrorism by continuously improving capabilities to deter, detect, respond to, and attribute attacks, in coordination with domestic and international partners.
OHA provides medical, public health, and scientific expertise in support of the Department of Homeland Security mission to prepare for, respond to, and recover from all threats.
The Office of Intelligence and Analysis equips the Homeland Security Enterprise with the intelligence and information it needs to keep the homeland safe, secure, and resilient.
The Office of Operations Coordination is responsible for monitoring the security of the United States on a daily basis and coordinating activities within the Department and with governors, Homeland Security Advisors, law enforcement partners, and critical infrastructure operators in all 50 States and more than 50 major urban areas nationwide.
The DHS Office of Policy serves as the Department’s principal source of thought leadership, policy development, and decision analysis for DHS senior leadership, Secretarial initiatives, and for other critical matters that may arise in a dynamic threat environment.