That's according to the map below, from Metric Maps (on Twitter @MetricMaps). Other oft-used names ... states apparently all named their counties by drawing from the same list. As the United ...

Using Census data, we've figured out that half of the United States population is clustered in just the 146 biggest counties out of over 3000. Here's the map, with said counties shaded in.

with some predating the United States entirely. So, how long have these Midstate counties been around, and how did they get their names? Adams County, home to one of the American Civil War’s ...