People like to live live near other people. Out of the 3,000+ counties in the United States, 146 contain half the population. So much for the 80/20 rule. It doesn’t seem to apply to population distribution.
Initially, finding my county on the map surprised me. It does not have a major metropolitan area. However, if half the country’s population lives in a relatively small number of counties, I have a 50/50 shot at living in one of them. Overall, the map shows there is still plenty of space for us to grow into.
Here’s another map (also cool). This one has the size of the countries adjusted to better match their population. Each square in the grid represents 1 million people.