Kansas

Jefferson

18,368
2020 population
1860
first census record
17
census records

About Jefferson

Jefferson, Kansas, first appears in the United States federal census in 1860, when it recorded a population of 4,459. At the most recent census, in 2020, its population stood at 18,368.

Its recorded population peaked at 19,126 in 2010, and has since declined by roughly 4 percent.

On the ground today, one documented military engagement has been recorded within the county, among them Attack on Hickory Point (Kansas) 1856, and 10 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202018,368
201019,126
200018,426
199015,905
198015,207
197011,945
196011,252
195011,084
194012,718
193014,129
192014,750
191015,826
190017,533
189016,620
188015,563
187012,526
18604,459
Source

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

Battles & engagements in Jefferson

Military engagements that took place in Jefferson, Kansas.

Attack on Hickory Point (Kansas) 1856
1856

Historic places in Jefferson

National Register of Historic Places listings in Jefferson, Kansas.

Delaware River Composite Truss Bridge
Valley Falls
Newell-Johnson-Searle House
Oskaloosa
Browse all Kansashistoric sites ›

Other counties in Kansas

Explore census history and historic records for more Kansas counties.

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Everything a full report reveals about Jefferson County, Kansas

This page charts the census history of Jefferson County, Kansas. 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 Jefferson

When does Jefferson first appear in the US census?
Jefferson, Kansas first appears in the federal census in 1860, with a recorded population of 4,459.
What is the population of Jefferson?
At the most recent federal census (2020), Jefferson had a recorded population of 18,368.
When did Jefferson's population peak?
Jefferson's recorded population peaked at 19,126 in 2010.
Were any battles fought in Jefferson?
1 documented military engagement took place in Jefferson, including Attack on Hickory Point (Kansas) 1856.
How many historic places are in Jefferson?
10 sites are listed on the National Register of Historic Places in Jefferson, Kansas.
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