Illinois

Randolph

30,163
2020 population
1800
first census record
23
census records

About Randolph

Randolph, Illinois, first appears in the United States federal census in 1800, when it recorded a population of 1,103. At the most recent census, in 2020, its population stood at 30,163.

Its recorded population peaked at 35,652 in 1980, and has since declined by roughly 15 percent.

On the ground today, 7 documented military engagements have been recorded within the county, among them Fort de Chartres garrison conflicts 1750-1763, Capture of Kaskaskia, Battle of Kaskaskia (Clark's Illinois Campaign), and 18 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202030,163
201033,476
200033,893
199034,583
198035,652
197031,379
196029,988
195031,673
194033,608
193029,313
192029,109
191029,120
190028,001
189025,049
188025,690
187020,859
186017,205
185011,079
18407,944
18304,429
18203,492
18107,275
18001,103
Source

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

Battles & engagements in Randolph

Military engagements that took place in Randolph, Illinois.

Fort de Chartres garrison conflicts 1750-1763
1750
Capture of Kaskaskia
1778
Battle of Kaskaskia (Clark's Illinois Campaign)
1778
Clark's Kaskaskia Expedition
1778
Battle of Kaskaskia Jul 4 1778
1778
Capture of Kaskaskia (Clark)
1778
Battle of Sink Hole May 24 1815
1815

Historic places in Randolph

National Register of Historic Places listings in Randolph, Illinois.

Kolmer Site
Prairie du Rocher
French Colonial Historic District
Prairie du Rocher
Fort de Chartres
Prairie du Rocher
Mary's River Covered Bridge
Chester
Modoc Rock Shelter
Modoc
Creole House
Prairie du Rocher
Piney Creek West Site
Campbell Hill
Piney Creek South Site
Campbell Hill
Red Bud Historic District
Red Bud
Piney Creek Site
Campbell Hill
Tegtmeyer Site
Campbell Hill
Shiloh College
Shiloh Hill
Weinrich, Christian F.
Chester
Old Fire Station
Chester
Weister, Frederick, House
Chester
Sparta Historic District
Sparta
Menard, Pierre, House
Ellis Grove
Charter Oak Schoolhouse
Schuline

Other counties in Illinois

Explore census history and historic records for more Illinois counties.

AdamsAlexanderBondBooneBrownBureauCalhounCarrollCassChampaignChristianClarkClayClintonColesCookCrawfordCumberlandDe WittDeKalb
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Everything a full report reveals about Randolph County, Illinois

This page charts the census history of Randolph 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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Frequently asked about Randolph

When does Randolph first appear in the US census?
Randolph, Illinois first appears in the federal census in 1800, with a recorded population of 1,103.
What is the population of Randolph?
At the most recent federal census (2020), Randolph had a recorded population of 30,163.
When did Randolph's population peak?
Randolph's recorded population peaked at 35,652 in 1980.
Were any battles fought in Randolph?
7 documented military engagements took place in Randolph, including Fort de Chartres garrison conflicts 1750-1763, Capture of Kaskaskia, Battle of Kaskaskia (Clark's Illinois Campaign).
How many historic places are in Randolph?
18 sites are listed on the National Register of Historic Places in Randolph, Illinois.
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