Missouri

DeKalb

11,029
2020 population
1850
first census record
18
census records

About DeKalb

DeKalb, Missouri, first appears in the United States federal census in 1850, when it recorded a population of 2,075. At the most recent census, in 2020, its population stood at 11,029.

Its recorded population peaked at 14,539 in 1890, and has since declined by roughly 24 percent.

On the ground today, 3 documented military engagements have been recorded within the county, among them DeKalb County MO Guerrilla Actions (1862), DeKalb County Skirmish, Maysville Skirmish (DeKalb County).

Population by decade

Census YearPopulationChart
202011,029
201012,892
200011,597
19909,967
19808,222
19707,305
19607,226
19508,047
19409,751
193010,270
192011,694
191012,531
190014,418
189014,539
188013,334
18709,858
18605,224
18502,075
Source

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

Battles & engagements in DeKalb

Military engagements that took place in DeKalb, Missouri.

DeKalb County MO Guerrilla Actions (1862)
1862
DeKalb County Skirmish
1862
Maysville Skirmish (DeKalb County)
1862

Other counties in Missouri

Explore census history and historic records for more Missouri counties.

IronJacksonJasperJeffersonJohnsonKnoxLacledeLafayetteLawrenceLewisLincolnLinnLivingstonMaconMadisonMariesMarionMcDonaldMercerMiller
Unlimited access

Everything a full report reveals about DeKalb County, Missouri

This page charts the census history of DeKalb County, Missouri. 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.
First month just $5.99, then $11.99 a month. Unlimited locations, cancel anytime.

Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.

Start your DeKalb County, Missouri report
Or see a real report first

Explore Missouri records

Missourihistory ›Notable people from Missouri›

Frequently asked about DeKalb

When does DeKalb first appear in the US census?
DeKalb, Missouri first appears in the federal census in 1850, with a recorded population of 2,075.
What is the population of DeKalb?
At the most recent federal census (2020), DeKalb had a recorded population of 11,029.
When did DeKalb's population peak?
DeKalb's recorded population peaked at 14,539 in 1890.
Were any battles fought in DeKalb?
3 documented military engagements took place in DeKalb, including DeKalb County MO Guerrilla Actions (1862), DeKalb County Skirmish, Maysville Skirmish (DeKalb County).
Aubrey Research

Research the history of any US location

Aubrey searches federal archives, archaeological records, historic registers, and primary sources to build a full historical report for any address or place in the United States.

Research your locationView a free sample report