Illinois

McDonough

27,238
2020 population
1840
first census record
19
census records

About McDonough

McDonough, Illinois, first appears in the United States federal census in 1840, when it recorded a population of 5,308. At the most recent census, in 2020, its population stood at 27,238.

Its recorded population peaked at 37,467 in 1980, and has since declined by roughly 27 percent.

On the ground today, 8 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202027,238
201032,612
200032,913
199035,244
198037,467
197036,653
196028,928
195028,199
194026,944
193027,329
192027,074
191026,887
190028,412
189027,467
188027,970
187026,509
186020,069
18507,616
18405,308
Source

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

Historic places in McDonough

National Register of Historic Places listings in McDonough, Illinois.

Kleinkopf, Clarence, Round Barn
Colchester
Macomb Courthouse Square historic District
Macomb
Bailey, William S., House
Macomb
McDonough County Courthouse
Macomb
Western Illinois State Normal School Building
Macomb
King, Moses, Brick and Tile Works
Colchester
Welling-Everly Horse Barn
Adair
Lamoine Hotel
Macomb

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Everything a full report reveals about McDonough County, Illinois

This page charts the census history of McDonough 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 McDonough

When does McDonough first appear in the US census?
McDonough, Illinois first appears in the federal census in 1840, with a recorded population of 5,308.
What is the population of McDonough?
At the most recent federal census (2020), McDonough had a recorded population of 27,238.
When did McDonough's population peak?
McDonough's recorded population peaked at 37,467 in 1980.
How many historic places are in McDonough?
8 sites are listed on the National Register of Historic Places in McDonough, Illinois.
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