YNP Facts & Figures
Yellowstone National Park Facts & Figures Established March 1, 1872. Boundary changes: May 26, 1926; March 1, 1929; April 19, 1930; Oct. 20, 1932. Designated a Biosphere Reserve 1976. Designated a World Heritage Site, Sept. 6, 1978. Basic Information The world’s first national park. 3,472 square miles/2,222,766.71 square acres in size (2,222,765.13 federal; 1.58 non-federal), larger… Read More »