The Executive Office of the President of the United States (EOP) comprises the offices and agencies that support the work of the president at the center of the executive branch of the United States federal government. The office consists of several offices and agencies, such as the White House Office (the staff working closest with the president, including West Wing staff), the National Security Council, Homeland Security Council, Office of Management and Budget, Council of Economic Advisers, and others. The Eisenhower Executive Office Building houses most staff.

The office is also referred to as a "permanent government", since many policy programs, and the people who are charged with implementing them, continue between presidential administrations.

The civil servants who work in the Executive Office of the President are regarded as nonpartisan and politically neutral, so they are capable of providing objective and impartial advice.

With the increase in technological and global advancement, the size of the White House staff has increased to include an array of policy experts responsible with managing various federal governmental functions and policy areas. As of 2015, it included approximately 1,800 positions, most of which did not require confirmation from the U.S. Senate.

The office is overseen by the White House chief of staff. Since January 20, 2025, that position has been held by Susie Wiles, who was appointed by President Donald Trump. She is the first woman to hold the title.

In 1937, the Brownlow Committee, which was a presidentially commissioned panel of political science and public administration experts, recommended sweeping changes to the executive branch of the U.S. federal government, including the creation of the Executive Office of the President. Based on these recommendations, President Franklin D. Roosevelt in 1939 lobbied Congress to approve the Reorganization Act of 1939. The Act led to Reorganization Plan No. 1, which created the office, which reported directly to the president.

The office encompassed two subunits at its outset, the White House Office (WHO) and the Bureau of the Budget, the predecessor to today's Office of Management and Budget, which was created in 1921 and originally located in the Treasury Department. It absorbed most of the functions of the National Emergency Council. Initially, the new staff system appeared more ambitious on paper than in practice; the increase in the size of the staff was quite modest at the start. However, it laid the groundwork for the large and organizationally complex White House staff that emerged during the presidencies of Roosevelt's successors.

Roosevelt's efforts are also notable in contrast to those of his predecessors in office. During the 19th century, presidents had few staff resources. Thomas Jefferson had one messenger and one secretary at his disposal, both of whose salaries were paid by the president personally. It was not until 1857 that Congress appropriated money ($2,500) for the hiring of one clerk.