Yes, Yellowstone National Park is owned and managed by the United States Federal Government. Established on March 1, 1872, it was the first national park in the world and is governed by the U.S. National Park Service (NPS), which is a bureau of the Department of the Interior. The park covers over 2.2 million acres across three states: Wyoming (96%), Montana (3%), and Idaho (1%). Because it is federal land, the park is subject to federal laws and the jurisdiction of the U.S. District Court for the District of Wyoming. The government provides the high-value infrastructure, including the Grand Loop Road, visitor centers, and the rangers who manage the park's wildlife and geothermal features like Old Faithful. While private companies (concessionaires) like Xanterra operate the hotels and restaurants within the park, they do so under strict government contracts, ensuring that the primary "ownership" and preservation mission remain with the public via the federal government.