On March 1, 1872, Congress established Yellowstone National Park in the Territories of Montana and Wyoming “as a public park or pleasuring ground for the benefit and enjoyment of the people” and placed it “under exclusive control of the Secretary of the Interior.” The founding of Yellowstone National Park began a worldwide national park movement. Today more than 100 nations contain some 1,200 national parks or equivalent preserves.

In the years following the establishment of Yellowstone, the United States authorized additional national parks and monuments, most of them carved from the federal lands of the West. These, also, were administered by the Department of the Interior, while other monuments and natural and historical areas were administered as separate units by the War Department and the Forest Service of the Department of Agriculture. No single agency provided unified management of the varied federal parklands.

An Executive Order in 1933 transferred 63 national monuments and military sites from the Forest Service and the War Department to the National Park Service. This action was a major step in the development of today’s truly national system of parks—a system that includes areas of historical as well as scenic and scientific importance.

On August 25, 1916, President Woodrow Wilson signed the act creating the National Park Service, a new federal bureau in the Department of the Interior responsible for protecting the 40 national parks and monuments then in existence and those yet to be established. This “Organic Act” states that “the Service thus established shall promote and regulate the use of Federal areas known as national parks, monuments and reservations… by such means and measures as conform to the fundamental purpose of the said parks, monuments and reservations, which purpose is to conserve the scenery and the natural and historic objects and the wild life therein and to provide for the enjoyment of the same in such manner and by such means as will leave them unimpaired for the enjoyment of future generations.”

The National Park Service still strives to meet those original goals, while filling many other roles as well: guardian of our diverse cultural and recreational resources; environmental advocate; world leader in the parks and preservation community; and pioneer in the drive to protect America’s open space.

Today, the National Park System of the United States comprises 378 areas covering more than 83 million acres in 49 States, the District of Columbia, American Samoa, Guam, Puerto Rico, Saipan, and the Virgin Islands. These areas are of such national significance as to justify special recognition and protection in accordance with various acts of Congress.

Additions to the National Park System are now generally made through acts of Congress, and national parks can be created only through such acts. But the President has authority, under the Antiquities Act of 1906, to proclaim national monuments on lands already under federal jurisdiction. The Secretary of the Interior is usually asked by Congress for recommendations on proposed additions to the System. The Secretary is counseled by the National Park System Advisory Board, composed of private citizens, which advises on possible additions to the System and policies for its management.

	Park	Date Estab.	State	Size (acres)*
1.	Yellowstone	1872	Wyoming	2,219,791
2.	Mackinack Island	1875	Michigan
	Given back to the state of Michigan in 1895.
3.	Sequoia	1890	California	402,482
4.	Yosemite	1890	California	761,236
5.	General Grant	1890	California	461,901
	Originally a small park, General Grant was incorporated into Kings Canyon in 1940.
6.	Mount Rainier	1899	Washington	235,613
7.	Crater Lake	1902	Oregon	183,224
8.	Wind Cave	1903	South Dakota	28,295
9.	Sully's Hill	1904	North Dakota
	Converted to a game preserve in 1931.
10.	Mesa Verde	1906	Colorado	52,122
11.	Platt	1906	Oklahoma	9,889
	Now part of Chickasaw National Recreation Area.
12.	Glacier	1910	Montana	1,013,572
13.	Rocky Mountain	1915	Colorado	265,727
14.	Hawaii Volcanoes	1916	Hawaii	209,695
15.	Lassen Volcanic	1916	California	106,372

* All acreages listed are the parks' current size. Most were much smaller when they were originally established.

Rev. 9/2001 klb