If you mean which country, then definitely China
The United Kingdom has the most tourists visiting Washington DC every year.
Washington dc is not a state.
Washington, DC
Washington DC
Washington - Baltimore Washington International, DC, USA (BWI) Washington - Washington - All Airports, DC, USA (WAS) Washington - Ronald Reagan National Airport, DC, USA (DCA) Washington - Washington Dulles, DC, USA (IAD)
no
No
Washington DC
there are no counties in Washington DC because Washington DC is a city itself.
Washington DC
Washington, DC
Most people who live in DC prefer to be called Washingtonians.