The US Forest Service is an agency of the United States Department of Agriculture that administers the nation's 155 national forests and 20 national grasslands which encompasses 193 million acres. Major divisions of the agency include the National Forest System, State and Private Forestry, and the Research and Development branch.

In 1876, Congress created the office of Special Agent in the Department of Agriculture to assess the state of the forests in the United States. Franklin B. Hough was appointed the head of the office. In 1881, the office was expanded into the newly-formed Division of Forestry. The Forest Reserve Act of 1891 authorized withdrawing land from the public domain as "forest reserves," managed by the Department of the Interior. In 1901, the Division of Forestry was renamed the Bureau of Forestry. The Transfer Act of 1905 transferred the management of forest reserves from the General Land Office of the Interior Department to the Bureau of Forestry, henceforth known as the US Forest Service. Gifford Pinchot was the first Chief Forester of the US Forest Service.

Significant federal legislation affecting the Forest Service includes the Multiple Use - Sustained Yield Act of 1960, P.L. 86-517; the Wilderness Act, P.L. 88-577; the National Forest Management Act, P.L. 94-588; the National Environmental Policy Act, P.L. 91-190; the Cooperative Forestry Assistance Act, P.L. 95-313; and the Forest and Rangelands Renewable Resources Planning Act, P.L. 95-307.