Fort Knox is a United States Army installation in Kentucky, south of Louisville and north of Elizabethtown. It is adjacent to the United States Bullion Depository, which is used to house a large portion of the United States' official gold reserves, and with which it is often conflated. The 109,000-acre base covers parts of Bullitt, Hardin and Meade counties. It currently holds the Army Human Resources Center of Excellence, including the Army Human Resources Command. It is named in honor of Henry Knox, Chief of Artillery in the American Revolutionary War and the first United States Secretary of War.

Henry Knox, a Founding Father of the United States, was a Boston bookseller who became a senior general of the Continental Army during the Revolutionary War, serving as chief of artillery in most of Washington's campaigns. Following the American Revolution, he oversaw the War Department under the Articles of Confederation from 1785 to 1789. Washington, at the start of his first administration, appointed Knox the nation's first Secretary of War, a position he held from 1789 to 1794. He is well known today as the namesake of Fort Knox in Kentucky, the repository of a large portion of the nation's gold reserves.