Illinois

Montgomery

28,288
2020 population
1830
first census record
20
census records

About Montgomery

Montgomery, Illinois, first appears in the United States federal census in 1830, when it recorded a population of 2,953. At the most recent census, in 2020, its population stood at 28,288.

Its recorded population peaked at 41,403 in 1920, and has since declined by roughly 32 percent.

On the ground today, 13 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202028,288
201030,104
200030,652
199030,728
198031,686
197030,260
196031,244
195032,460
194034,499
193035,278
192041,403
191035,311
190030,836
189030,003
188028,078
187025,314
186013,979
18506,277
18404,490
18302,953
Source

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

Historic places in Montgomery

National Register of Historic Places listings in Montgomery, Illinois.

Thomas, Lewis H., House
Virden
Hayward-Hill House
Hillsboro
Blackman, George, House
Hillsboro
Litchfield Public Library
Litchfield
Manske-Niemann Farm
Litchfield
Brown Shoe Company Factory
Litchfield
Grubbs, Samuel Moody, House
Litchfield
Freeman-Brewer-Sawyer House
Hillsboro
Montgomery County Courthouse
Hillsboro
Litchfield Elks Lodge No. 654
Litchfield
Belvidere Cafe, Motel and Gas Station
Litchfield
Ariston Cafe
Litchfield
Browse all Illinoishistoric sites ›

Other counties in Illinois

Explore census history and historic records for more Illinois counties.

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Everything a full report reveals about Montgomery County, Illinois

This page charts the census history of Montgomery 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 Montgomery

When does Montgomery first appear in the US census?
Montgomery, Illinois first appears in the federal census in 1830, with a recorded population of 2,953.
What is the population of Montgomery?
At the most recent federal census (2020), Montgomery had a recorded population of 28,288.
When did Montgomery's population peak?
Montgomery's recorded population peaked at 41,403 in 1920.
How many historic places are in Montgomery?
13 sites are listed on the National Register of Historic Places in Montgomery, Illinois.
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