counties
Frederick County â the farthest flung and most rural of the three counties but still home to a large commuter population, where the main attraction is the main city, Frederick
Prince George's County â the country's wealthiest majority black county, and is home to the University of Maryland, as well as much of what you would expect to be in D.C.âhuge outposts of government agencies like NASA and the Department of Agriculture, as well as the Washington Redskins
Montgomery County â one of the wealthiest counties in the U.S., much of the county is very urban, and home to an enormous commuter population of professionals working in the city
