These maps, from the National Atlas of the United States, show federal lands controlled by the Bureau of Land Management (yellow), Bureau of Reclamation (red), Department of Defense (pink), the Forest Service (celadon), the Fish and Wildlife Service (orange), the National Park Service (dark green), and the Tennessee Valley Authority (light green).
According to figures from a 2012 Congressional Research Service report, the federal government owns 47 percent of the land in the 11 western states plus 62 percent of the land in Alaska. And those figures don’t include land that the federal government manages but doesn’t own. The federal government owns 81 percent of the land in Nevada. [“Federal Land Ownership: Overview and Data,” by Ross W. Gorte, et al., Congressional Research Service, February 8, 2012]