The Delaware Valley comprises counties in southeastern Pennsylvania, western New Jersey, northern Delaware and northeastern Maryland. Per a bulletin released by the OMB (United States Office of Management and Budget) in 2013, the Philadelphia–Camden–Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area consists of the following:
Five counties in Pennsylvania: Bucks, Chester, Delaware, Montgomery and Philadelphia
Four counties in New Jersey: Burlington, Camden, Gloucester and Salem
One county in Delaware: New Castle
One county in Maryland: Cecil
As of 2013, the Philadelphia metropolitan area was ranked sixth out of the country's 917 Core Based Statistical Areas (CBSAs) of the United States in terms of population size.
The New York metropolitan area ranks first, followed by Los Angeles, Chicago, Dallas, and Houston.
According to the 2010 U.S. Census, the Delaware Valley has a population of 5,965,343 people, with 6,051,170 estimated for 2013. A U.S. Census estimate predicts Pennsylvania to have a total of 12,787,209 residents in 2014 and 318,857,056 in the entire country.
The population of the individual counties in the Delaware Valley is as follows (2014 U.S. census estimates):
Bucks — 626,685
Chester — 512, 784
Delaware — 562,960
Montgomery — 816,857
Burlington — 449,722
Camden — 511,038
Gloucester — 290,951
Salem — 64,715
New Castle — 552,778
Cecil — 102,383
The 2014 population estimate of Philadelphia proper is 1,560,297, while according to the 2010 U.S. Census report, it was 1,526,006 just four years earlier. That same 2010 Census report shows that 52.8 percent of persons residing in the city of Philadelphia are female; 47.2 percent are male.
Here are a few more demographics from the report:
Persons 65 years and older: 12.1 percent
Persons 17 years and younger: 22.5 percent
Persons 4 years and younger: 6.6 percent
Caucasian population: 41 percent
African-American population: 43.4 percent
Hispanic or Latino population: 12.3 percent
Median household income: $37,192
The City of Philadelphia is 134.10 square miles, making it the smallest county in the region geographically but the largest in population (11,379.50 persons per square mile). The sizes of the other Pennsylvania metropolitan counties are Bucks (607 sq.miles), Chester (756 sq.miles), Delaware (184 sq. miles), and Montgomery (483 sq. miles). The sizes of the metropolitan counties in New Jersey are Burlington (805 sq. miles), Camden (222 sq.miles), Gloucester (325 sq. miles) and Salem (338 sq. miles).