Population density in the US varies wildly from place to place.
I thought I shared this map or something very similiar a while back in 2013 when it was widely being shared but I couldn’t find it. Many countries have highly concentrated population distributions (like Canada and Australia) and the United States has pockets of extreme density interspersed throughout the country. On the flip side, vast swaths of the countries are considered empty in terms of population such as this map that shows 1% of the total U.S. population in 42% of the area. and this one of the world that shows uneven patterns.