County Census Records
Pennsylvania Counties
67 counties with population data from the decennial US Census, 1790 to 2020.
67 counties
Population as of 2020 census
Adams
103,852
Allegheny
1,250,578
Armstrong
65,558
Beaver
168,215
Bedford
47,577
Berks
428,849
Blair
122,822
Bradford
59,967
Bucks
646,538
Butler
193,763
Cambria
133,472
Cameron
4,547
Carbon
64,749
Centre
158,172
Chester
534,413
Clarion
37,241
Clearfield
80,562
Clinton
37,450
Columbia
64,727
Crawford
83,938
Cumberland
259,469
Dauphin
286,401
Delaware
576,830
Elk
30,990
Erie
270,876
Fayette
128,804
Forest
6,973
Franklin
155,932
Fulton
14,556
Greene
35,954
Huntingdon
44,092
Indiana
83,246
Jefferson
44,492
Juniata
23,509
Lackawanna
215,896
Lancaster
552,984
Lawrence
86,070
Lebanon
143,257
Lehigh
374,557
Luzerne
325,594
Lycoming
114,188
McKean
40,432
Mercer
110,652
Mifflin
46,143
Monroe
168,327
Montgomery
856,553
Montour
18,136
Northampton
312,951
Northumberland
91,647
Perry
45,842
Philadelphia
1,603,797
Pike
58,535
Potter
16,396
Schuylkill
143,049
Snyder
39,736
Somerset
74,129
Sullivan
5,840
Susquehanna
38,434
Tioga
41,045
Union
42,681
Venango
50,454
Warren
38,587
Washington
209,349
Wayne
51,155
Westmoreland
354,663
Wyoming
26,069
York
456,438
Unlimited access
Everything a full the United States report reveals
Pick any location and Aubrey pulls together 18 strands of its history, each drawn from the record:
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.
First month just $5.99, then $11.99 a month. Unlimited locations, cancel anytime.
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Aubrey Research
Research the history of any US location
Aubrey searches federal archives, archaeological records, historic registers, and primary sources to build a full historical report for any address or place in the United States.