A report on Allegheny County, Pennsylvania

1680 British map of western Pennsylvania and Allegheny County from the Darlington Collection
The Allegheny County Courthouse
County Medical Examiner office
2020 Presidential Election by Township and City Biden: Trump:
Employment by occupation in Allegheny County
Map of Allegheny County, Pennsylvania Public School Districts
Map of Allegheny County, Pennsylvania, with municipal labels showing cities and boroughs (red), Townships (white), and census-designated places (blue)

Located in the southwest of the U.S. state of Pennsylvania.

- Allegheny County, Pennsylvania
1680 British map of western Pennsylvania and Allegheny County from the Darlington Collection

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Pittsburgh

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Fort Pitt Blockhouse, built by the British in 1764, is the oldest extant structure in Pittsburgh.
Monongahela River scene, 1857
Downtown facade memorializing Pittsburgh's industrial heritage with an image of legendary steelworker Joe Magarac
Pittsburgh in 1874, by Otto Krebs
Burning of Union Depot, Pittsburgh, during the Pittsburgh railroad strike of 1877
Pittsburgh in 1903
Downtown Pittsburgh and the Duquesne Incline from Mt. Washington
Pittsburgh's 90 distinct neighborhoods
Downtown Pittsburgh from Station Square
The Carnegie Library, Museums of Art and Natural History (foreground), Carnegie Mellon University (background)
The North Side
Bird's-eye view of Pittsburgh, 1902
The Shadyside neighborhood
Panorama of Pittsburgh, PA from the Duquesne Incline which shows the confluence of the Allegheny (left) and the Monongahela (right) rivers which merge to form the Ohio River (lower left)
ALCOSAN Treatment Plant
Map of racial distribution in Pittsburgh, 2010 U.S. census. Each dot is 25 people:
Phipps Conservatory
Benedum Center
Pittsburgh from the West End Overlook
PNC Park, home of the Pittsburgh Pirates
Heinz Field, home of the Pittsburgh Steelers and the Pittsburgh Panthers (football)
Petersen Events Center, home of Pittsburgh Panthers basketball
Palumbo Center, home of Duquesne Dukes basketball
Pittsburgh Vintage Grand Prix
The Pittsburgh City-County Building, the seat of government of the City of Pittsburgh.
2020 Presidential Election by Precinct Biden: Trump:
A Ford Taurus and a Chevrolet Impala belonging to the Pittsburgh Bureau of Police
The University of Pittsburgh
Carnegie Mellon University
KDKA studios at Gateway Center
UPMC's flagship, UPMC Presbyterian
Allegheny General, the flagship of the Allegheny Health Network
Pittsburgh's numerous bridges visible from the air
I-279
The Steel Plaza subway station
Penn Station was built in 1903

Pittsburgh is a city in the Commonwealth of Pennsylvania and the county seat of Allegheny County.

Allegheny River

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325 mi long headwater stream of the Ohio River in western Pennsylvania and New York, United States.

325 mi long headwater stream of the Ohio River in western Pennsylvania and New York, United States.

The Allegheny River is named as Ohio on a sketch by George Washington.
Much of the Allegheny River's course is through hilly woodlands.
The Highland Park Bridge crosses the Allegheny River at Aspinwall, Pennsylvania, just above Allegheny River Lock and Dam No. 2.
The headwaters of the Allegheny River are in this meadow in Potter County
The Allegheny River drainage basin covers parts of New York and Pennsylvania in the United States.
The eastern part of Allegheny Islands State Park and the C. W. Bill Young Lock and Dam (No. 3) on the Allegheny River
Seneca Chief Cornplanter
The Kinzua Dam and Allegheny Reservoir
The Allegheny River at Foxburg, Pennsylvania
The Allegheny (left) and Monongahela (right) join to form the Ohio River at Pittsburgh, Pennsylvania.

The river enters both Allegheny and Westmoreland counties, the Pittsburgh suburbs, and the City of Pittsburgh from the northeast.

McKeesport, Pennsylvania

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Bird's-eye view of the National Tube Works in 1888.
The Carnegie Free Library of McKeesport, built in 1902
The Jerome Street Bridge (aka Lysle Blvd or 5th Avenue Bridge)
Sign along Youghiogheny River Trail

McKeesport is a city in Allegheny County, Pennsylvania, United States; it is situated at the confluence of the Monongahela and Youghiogheny rivers and within the Pittsburgh metropolitan area.

Greater Pittsburgh

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Populous region in the United States centered around its largest city and economic hub, Pittsburgh, Pennsylvania.

Populous region in the United States centered around its largest city and economic hub, Pittsburgh, Pennsylvania.

Border of Pittsburgh Megaregion showing included counties
PNC Park, home of the Pittsburgh Pirates since 2001.
The University of Pittsburgh
Pittsburgh International Airport's Landside Terminal
Port Authority light rail train, Washington Junction Station, March 2005.

The region encompasses Pittsburgh's urban core county, Allegheny, and six adjacent Pennsylvania counties (Armstrong, Beaver, Butler, Fayette, Washington, and Westmoreland) in Western Pennsylvania which constitute the Pittsburgh, PA Metropolitan Statistical Area (MSA) as defined by the U.S. Census Bureau.

The Washington County Courthouse during the winter

Washington County, Pennsylvania

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County in the U.S. state of Pennsylvania.

County in the U.S. state of Pennsylvania.

The Washington County Courthouse during the winter
The F. Julius LeMoyne House serves as the headquarters of the Washington County Historical Society.
Map of Washington County, Pennsylvania School Districts
Citizens Library in Washington, PA
Map of Washington County, Pennsylvania with municipal labels showing cities and boroughs (red), townships (white), and Census-designated places (blue).

Allegheny County (NNE-northeast)

The fountain in Point State Park, which sprays water up to 150 ft in the air at the head of the Ohio River.

Point State Park

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The fountain in Point State Park, which sprays water up to 150 ft in the air at the head of the Ohio River.
This is the Point in 1951 Pittsburgh showing the Point Bridge II (right) and the Manchester Bridge (left).
The underpass under Interstate 279 in the park
Period map showing strategic location of 18th century forts at Forks of the Ohio
This map from 1900 demonstrates how densely developed the site became.
Brick pavers mark the outline of where Fort Duquesne was located.
The Fort Pitt Blockhouse
Del Monte Foods office building in the background
Heinz Field in the background
Heinz Field and Carnegie Science Center
West End Bridge
At the point

Point State Park (locally known as The Point) is a Pennsylvania state park on 36 acre in Downtown Pittsburgh, Allegheny County, Pennsylvania, USA, at the confluence of the Allegheny and Monongahela rivers, forming the Ohio River.

Map of Westmoreland County, Pennsylvania Public School Districts

Westmoreland County, Pennsylvania

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County located in the U.S. state of Pennsylvania.

County located in the U.S. state of Pennsylvania.

Map of Westmoreland County, Pennsylvania Public School Districts
Autumn on a small state road near the Pennsylvania Turnpike in Laurel Mountains.
Map of Westmoreland County, Pennsylvania with Municipal Labels showing cities and boroughs (red), Townships (white), and Census-designated places (blue).

Westmoreland County originally included the present-day counties of Fayette, Washington, Greene, and parts of Beaver, Allegheny, Indiana, and Armstrong counties.

Eastward along the toll section of I-376 (then PA 60) in North Beaver Township, Lawrence County

Interstate 376

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Major auxiliary route of the Interstate Highway System in the US state of Pennsylvania, located within the Allegheny Plateau.

Major auxiliary route of the Interstate Highway System in the US state of Pennsylvania, located within the Allegheny Plateau.

Eastward along the toll section of I-376 (then PA 60) in North Beaver Township, Lawrence County
I-376 westbound past the Brighton Road interchange in Brighton Township
I-376 westbound at the PA 121 exit in Green Tree
I-376 westbound between the Fort Pitt Bridge and Fort Pitt Tunnel
I-376 westbound approaching Downtown Pittsburgh
I-376 westbound at the Squirrel Hill Tunnel
I-376 westbound from the Smithfield Street Bridge in Downtown Pittsburgh
I-376 at the former terminus with I-279 in Pittsburgh
The western end of I-376 at I-279 in Pittsburgh in 2003
Signs reading "Future I-376 Corridor" were posted along PA 60 from late April 2006 until 2010. This one was located on the New Castle Bypass.
A "Toll I-376" trailblazer on the tolled section of I-376
I-376 Bus shield in Moon Township

Within Allegheny County, the route runs along the majority of the Penn-Lincoln Parkway, known locally as Parkway West and Parkway East.

Monroeville, Pennsylvania

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Village of Monroeville in Patton Township, PA in 1876

Monroeville is a municipality with home rule status in Allegheny County, Pennsylvania.

"A Plan of the New Fort at Pitts-Burgh", drawn by cartographer John Rocque and published in 1765.

Fort Pitt (Pennsylvania)

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Fort built by British forces between 1759 and 1761 during the French and Indian War at the confluence of the Monongahela and Allegheny rivers, where the Ohio River is formed in western Pennsylvania .

Fort built by British forces between 1759 and 1761 during the French and Indian War at the confluence of the Monongahela and Allegheny rivers, where the Ohio River is formed in western Pennsylvania .

"A Plan of the New Fort at Pitts-Burgh", drawn by cartographer John Rocque and published in 1765.
Artist's interpretation of Fort Pitt in 1759, with Allegheny (left) and Monongahela rivers. At their confluence is the Ohio River (bottom)
The Fort Pitt Blockhouse, constructed in 1764
A view of the Fort Pitt Museum from Mount Washington; its structure is a re-creation of a bastion of Ft. Pitt.

British colonial protection of this area ultimately led to the development of Pittsburgh and Allegheny County, Pennsylvania by British-American colonists and immigrants.