Pennsylvania

Armstrong

65,558
2020 population
1800
first census record
23
census records

About Armstrong

Armstrong, Pennsylvania, first appears in the United States federal census in 1800, when it recorded a population of 2,399. At the most recent census, in 2020, its population stood at 65,558.

Its recorded population peaked at 81,087 in 1940, and has since declined by roughly 19 percent.

On the ground today, 4 documented military engagements have been recorded within the county, among them Kittanning Expedition 1756, Kittanning Raid, Battle of Kittanning (Armstrong's Expedition), and 15 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202065,558
201068,941
200072,392
199073,478
198077,768
197075,590
196079,524
195080,842
194081,087
193079,298
192075,568
191067,880
190052,551
189046,747
188047,641
187043,382
186035,797
185029,560
184028,365
183017,701
182010,324
18106,143
18002,399
Source

Population data from the United States decennial census, U.S. Census Bureau (public domain).

Battles & engagements in Armstrong

Military engagements that took place in Armstrong, Pennsylvania.

Kittanning Expedition 1756
1756
Kittanning Raid
1756
Battle of Kittanning (Armstrong's Expedition)
1756
Kittanning Raid – Armstrong's Expedition 1756
1756

Historic places in Armstrong

National Register of Historic Places listings in Armstrong, Pennsylvania.

Armstrong County Courthouse and Jail
Kittanning
Marshall, Thomas, House
Dayton
Ford City Armory
Ford City
Allegheny River Lock and Dam No. 9
Widnoon
Allegheny River Lock and Dam No. 6
Freeport
Allegheny River Lock and Dam No.8
Templeton
Allegheny River Locka and Dam No. 5
Freeport
Allegheny River Lock and Dam No. 7
Kittanning
Bradys Bend Iron Company Furnaces
Bradys Bend
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Everything a full report reveals about Armstrong County, Pennsylvania

This page charts the census history of Armstrong County, Pennsylvania. A full Aubrey report for an address here pulls together everything the historical record holds about the ground, from the earliest settlement to the twentieth century:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Frequently asked about Armstrong

When does Armstrong first appear in the US census?
Armstrong, Pennsylvania first appears in the federal census in 1800, with a recorded population of 2,399.
What is the population of Armstrong?
At the most recent federal census (2020), Armstrong had a recorded population of 65,558.
When did Armstrong's population peak?
Armstrong's recorded population peaked at 81,087 in 1940.
Were any battles fought in Armstrong?
4 documented military engagements took place in Armstrong, including Kittanning Expedition 1756, Kittanning Raid, Battle of Kittanning (Armstrong's Expedition).
How many historic places are in Armstrong?
15 sites are listed on the National Register of Historic Places in Armstrong, Pennsylvania.
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