There are more than 300 million people living in the United States today, but America is such a huge country that we still have staggeringly vast areas that are completely devoid of humans. This map illustrates those places. Everything colored green is a census block with zero population.
The eastern US is pretty well populated except for a few spots in mountains and swamps. There’s plenty of rural land, plenty of forests, but you’re never far from a farm, if not a town.
The west is a completely a different story. It’s covered with enormous stretches of land that are simply empty of people. There are towns along major roads, rivers, and rail lines, but vast emptiness between.
And Alaska’s emptiness makes even the western contiguous states look densely populated. Those green areas near the Arctic Circle look bigger than entire states.