Jefferson County, KS Demographics
Jefferson County, KS is the 30th most populous of 105 counties in Kansas, with 18,368 residents across 533 square miles. That is about 34 people per square mile.
At the 2020 census
| Population | 18,368 |
|---|---|
| Land area | 533 sq mi |
| Density | 34 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Jefferson County compares to the US
We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Jefferson County, KS
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Jefferson County, KS — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Jefferson County, KS
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 201.01 | 6,017 | 120.6 | 50 |
| Census Tract 203 | 5,619 | 161.4 | 35 |
| Census Tract 202 | 3,751 | 184.1 | 20 |
| Census Tract 201.02 | 2,981 | 66.5 | 45 |
Related places
Other counties nearby
Nearest counties
Metro areas containing Jefferson County
About this page
This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.
Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.