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Culturally, the Delaware Valley is taken by various commercial media and advertising venues to mean the Philadelphia metropolitan area, but geographically, geologically, and historically the term used to refer to the valley through which the Delaware River flows. In geology and geography, a strict sense of the term would incorporate the Delaware River's main drainage basin, so encompass major tributaries such as the Schuylkill River and Lehigh River and their valleys or sub-basins. These extensions also apply culturally with decreasing degree gradually decreased by proximal distance because the ease of land travel enables a great deal of daily interaction; for example, the large number of commuters which travel daily 45–90 minutes creates cultural blends and parallel values. However, this article discusses the economic region centered on the cities on the tidal part of the Delaware Valley, including the metropolitan areas centered on Philadelphia; Reading, Pennsylvania; Camden, New Jersey; Trenton, New Jersey and Wilmington, Delaware. It is roughly the Philadelphia–Reading–Trenton-Camden–Wilmington, Pennsylvania–New Jersey–Delaware–Maryland (PA-NJ-DE-MD) Metropolitan Statistical Area. The Delaware Valley as discussed here is composed of several counties in Eastern Pennsylvania and Western New Jersey, one county in northern Delaware and one county in northeastern Maryland. The area has a population of over 7.1 million (as of the 2010 Census Bureau count). Philadelphia, being the region's major commercial, cultural, and industrial center, maintains a rather large sphere of influence that affects the counties that immediately surround it. The majority of the region's populace resides in Pennsylvania, New Jersey, and Delaware. As of March 2011, the Philadelphia–Camden–Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area and its CSA is the sixth-largest metropolitan area in the United States〔(Metro area populations (as of March 7, 2011) ), Business First, March 22, 2011.〕〔(Annual Metropolitan and Micropolitan Statistical Area Estimates )〕 and is located towards the southern end of the Northeast megalopolis extending from Boston to Washington, D.C. Based on commuter flows, the OMB also defines a wider labor market region that adds Berks County, Pennsylvania to the Philadelphia–Camden–Wilmington CSA bringing the total metropolitan population to 6.53 million. Philadelphia's media ranks fourth, behind New York City, Los Angeles, and Chicago, in Nielsen Media Market size rankings. Such educational institutions as Delaware Valley Regional High School in Alexandria Township and Delaware Valley College in Doylestown Township are named after the region. Likewise, Frenchtown's now defunct newspaper The Delaware Valley News was another example of the usage. ==Counties making up the Delaware Valley== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Delaware Valley」の詳細全文を読む スポンサード リンク
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