A country made of counties: How much do you know about these regions?
In which U.S. state is the wealthy Loudoun County located?
Articles you might like
Explore more American facts
Choose your favorite category!
General
As American as apple pie—the very best America has to offer!
Culture
Delve into the astounding richness of American lore.
Geography
Hop in and explore vast and diverse American landscapes.
History
Discover the key moments that shaped the United States.