This animation shows the population density of U.S. counties between 1790 and 2010, showing the westward expansion of the country's population.
These maps of North America and Europe use a deceivingly simple method to plot population density: replacing each town with a single dot.
More people live in the tiny red region than all of the blue areas combined. This map really shows the disparity in population density throughout the...
This infographic breaks down the top cities for millionaires sorted by density and total population, as well as providing demographics.