Illinois

Hardin

3,649
2020 population
1840
first census record
19
census records

About Hardin

Hardin, Illinois, first appears in the United States federal census in 1840, when it recorded a population of 1,378. At the most recent census, in 2020, its population stood at 3,649.

Its recorded population peaked at 7,759 in 1940, and has since declined by roughly 53 percent.

On the ground today, one documented military engagement has been recorded within the county, among them Kincaid Site Warfare (Illinois), and 5 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
20203,649
20104,320
20004,800
19905,189
19805,383
19704,914
19605,879
19507,530
19407,759
19306,955
19207,533
19107,015
19007,448
18907,234
18806,024
18705,113
18603,759
18502,887
18401,378
Source

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

Battles & engagements in Hardin

Military engagements that took place in Hardin, Illinois.

Kincaid Site Warfare (Illinois)
1400

Historic places in Hardin

National Register of Historic Places listings in Hardin, Illinois.

Rose Hotel
Elizabethtown
Battery Rock
Cave-in-Rock
Illinois Iron Furnace
Rosiclare
Orr-Herl Mound and Village Site
Rosiclare
Cave-In-Rock
Cave-In-Rock

Other counties in Illinois

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Everything a full report reveals about Hardin County, Illinois

This page charts the census history of Hardin County, Illinois. 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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Illinoishistory ›NRHP historic sites ›Notable people from Illinois›

Frequently asked about Hardin

When does Hardin first appear in the US census?
Hardin, Illinois first appears in the federal census in 1840, with a recorded population of 1,378.
What is the population of Hardin?
At the most recent federal census (2020), Hardin had a recorded population of 3,649.
When did Hardin's population peak?
Hardin's recorded population peaked at 7,759 in 1940.
Were any battles fought in Hardin?
1 documented military engagement took place in Hardin, including Kincaid Site Warfare (Illinois).
How many historic places are in Hardin?
5 sites are listed on the National Register of Historic Places in Hardin, Illinois.
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