National Petroleum Reserve–Alaska

The National Petroleum Reserve in Alaska is an area of land on the Alaska North Slope owned by the United States federal government and managed by the Department of the Interior, Bureau of Land Management. It lies to the west of the Arctic National Wildlife Refuge, which, as a U.S. Fish and Wildlife Service managed National Wildlife Refuge, is also federal land.

At a size of 23,599,999 acres, the NPRA is the largest tract of undisturbed public land in the United States. Inupiat live in several villages around its perimeter, the largest of which is Utqiaġvik, the seat of the North Slope Borough.