Pennsylvania

Warren

38,587
2020 population
1800
first census record
23
census records

About Warren

Warren, Pennsylvania, first appears in the United States federal census in 1800, when it recorded a population of 233. At the most recent census, in 2020, its population stood at 38,587.

Its recorded population peaked at 47,682 in 1970, and has since declined by roughly 19 percent.

On the ground today, 11 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202038,587
201041,815
200043,863
199045,050
198047,449
197047,682
196045,582
195042,698
194042,789
193041,453
192040,024
191039,573
190038,946
189037,684
188027,981
187023,897
186019,190
185013,671
18409,278
18304,697
18201,976
1810827
1800233
Source

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

Historic places in Warren

National Register of Historic Places listings in Warren, Pennsylvania.

Jefferson. John P., House
Warren
Irvine, Guy C., House
Russell
Hazeltine, A. J., House
Warren
Warren Historic District
Warren
Woman's Club of Warren
Warren
Irvine United Presbyterian Church
Irvine
Struthers Library Building
Warren
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Everything a full report reveals about Warren County, Pennsylvania

This page charts the census history of Warren 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 Warren

When does Warren first appear in the US census?
Warren, Pennsylvania first appears in the federal census in 1800, with a recorded population of 233.
What is the population of Warren?
At the most recent federal census (2020), Warren had a recorded population of 38,587.
When did Warren's population peak?
Warren's recorded population peaked at 47,682 in 1970.
How many historic places are in Warren?
11 sites are listed on the National Register of Historic Places in Warren, Pennsylvania.
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