Concentrations of people and economic activity

The USA is a big country.  But its population and economic activity are not evenly spread across the country.

Here are the counties where half the U.S. population lives.

Here are counties where half of U.S. economic activity takes place.

And, below, the counties carried by Hillary Clinton in 2016—in blue, of course.   She carried 88 of the 100 largest U.S. counties.