We know that DC has more people than Wyoming and about to pass Vermont. Reddit user desert_wombat created a map of all US counties that are more populous than some states.
With 9.8 million people, Los Angeles County is larger than North Carolina, the 10th most populous US state. (It’s also geographically larger than Rhode Island and Delaware, combined).
Baltimore County (which doesn’t include Baltimore City) is more populous than Wyoming, Vermont, North Dakota and Alaska; Prince George’s is also larger than South Dakota; Montgomery County larger than Delaware; and Fairfax County has more people than all of those as well as Montana and Rhode Island.
Thanks to Dan Malouff for the tip via Twitter.