Subregions of Philadelphia County
Till now Philadelphia County has
2 played regions below it. Following direct parts of Philadelphia County have been played until new:
Sibling Regions of Philadelphia County
Played regions on same layer like Philadelphia County till now:
Neither Ruled nor Mapped Sibling Regions yet: Beaver County,
Berks County,
Chester County,
Crawford County,
Delaware County,
Fayette County,
Greene County,
Mercer County,
Monroe County,
Northampton County,
Warren County,
Washington County,
Westmoreland County.
Allegheny County 
Erie County.
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United States of America
Pennsylvania
Philadelphia County