D.C.

According to the United States Geological Survey, nearly half the land in the Western United States is owned by the federal government. This includes 84.9 percent of land in Nevada (hiding UFOs requires lots of space), 64.9 percent of Utah, 61.6 percent of Idaho, 61.2 percent of Alaska, 52.9 percent of Oregon, 48.1 percent of Wyoming, and 45.8 percent in California. Meanwhile, the federal government owns only about 5 percent of the land in states east of the Mississippi River. Altogether, Uncle Sam owns roughly 640 million acres of land.