United States. Department of the Interior

The United States Department of the Interior is a cabinet-level department of the federal government, established in 1849. Unlike interior ministries in many other countries, it is not mainly focused on policing or security; its central role is managing public lands, natural resources, and parts of the nation's cultural heritage.

Over time, the department brought together responsibilities that shaped life across the country, including land administration, relations with Indigenous nations, scientific surveying, and conservation. It oversees well-known bureaus and services such as the National Park Service, the U.S. Geological Survey, the Bureau of Land Management, and the Bureau of Indian Affairs, giving it a wide reach across both environmental policy and public history.

Its official mission emphasizes protecting and managing the nation's natural resources and cultural heritage, providing scientific information, and honoring trust responsibilities to American Indians, Alaska Natives, Native Hawaiians, and affiliated island communities. That combination makes the department an important part of how the United States understands, studies, and cares for its landscapes.