Knox County, IL Demographics
Knox County, IL is the 29th most populous of 102 counties in Illinois, with 49,967 residents across 716 square miles. That is about 70 people per square mile.
At the 2020 census
| Population | 49,967 |
|---|---|
| Land area | 716 sq mi |
| Density | 70 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Knox 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: Knox County, IL
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Knox County, IL — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Knox County, IL
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 5 | 5,462 | 6.6 | 822 |
| Census Tract 4 | 4,873 | 11.9 | 410 |
| Census Tract 3 | 4,134 | 5.6 | 742 |
| Census Tract 13 | 3,722 | 9.7 | 386 |
| Census Tract 15 | 3,682 | 42.7 | 86 |
| Census Tract 10 | 3,657 | 2.7 | 1,371 |
| Census Tract 6 | 3,497 | 0.9 | 4,031 |
| Census Tract 16 | 3,031 | 186.3 | 16 |
| Census Tract 1 | 3,011 | 201.0 | 15 |
| Census Tract 2 | 2,985 | 100.6 | 30 |
| Census Tract 8 | 2,391 | 0.6 | 4,159 |
| Census Tract 11 | 2,245 | 2.4 | 931 |
| Census Tract 9 | 2,047 | 4.3 | 471 |
| Census Tract 7 | 1,901 | 1.4 | 1,372 |
| Census Tract 14 | 1,717 | 113.8 | 15 |
| Census Tract 12 | 1,612 | 25.9 | 62 |
Related places
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Metro areas containing Knox 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.