Northwest Pennsylvania

Northwestern Pennsylvania
The city of Erie from Lake Erie.
Map of counties in Northwestern Pennsylvania
Coordinates: 42°07′23″N 80°04′54″W / 42.123°N 80.0816°W / 42.123; -80.0816Coordinates: 42°07′23″N 80°04′54″W / 42.123°N 80.0816°W / 42.123; -80.0816
Country	United States
Commonwealth	Pennsylvania
Largest city	Erie
Other cities	List In Region: Butler Clarion Hermitage Marienville Meadville New Castle Oil City Punxsutawney Warren
Population (2015 est.)
• Total	938,516
Time zone	ET (UTC-5)
• Summer (DST)	EDT (UTC-4)

Northwestern Pennsylvania is a region in the Commonwealth of Pennsylvania, containing 10 counties. The city of Erie is the business center and cultural hub of the region. The compiled population of the region was estimated to be 938,516 in 2015. Although the only county with population growth was Butler, the deficit for all other counties was within 3%. The region also includes the Erie-Meadville, PA Combined Statistical Area.

Northwestern Pennsylvania is home to the Allegheny National Forest, and is the heart of Pennsylvania's oil and gas economy.