Philadelphia is in the United States.
The capital is Washington , D.C. , and the largest city is New York City ; nine other major metropolitan areas -- each with at least 4.5 million inhabitants and the largest having more than 13 million people -- are Los Angeles , Chicago , Dallas , Houston , Philadelphia , Miami , Atlanta , Boston , and San Francisco .	New York City	New York City	metropolitan areas	List of Metropolitan Statistical Areas	Los Angeles	Greater Los Angeles Area	Chicago	Chicago metropolitan area	Dallas	DallasFort Worth Metroplex	Houston	Greater Houston	Philadelphia	Delaware Valley	Miami	Miami metropolitan area	Atlanta	Atlanta metropolitan area	Boston	Greater Boston	San Francisco	San Francisco Bay Area
