Shelby County, IL Demographics
Shelby County, IL is the 56th most populous of 102 counties in Illinois, with 20,990 residents across 759 square miles. That is about 28 people per square mile.
At the 2020 census
| Population | 20,990 |
|---|---|
| Land area | 759 sq mi |
| Density | 28 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Shelby 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: Shelby County, IL
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Shelby County, IL — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Shelby County, IL
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9593 | 4,935 | 6.8 | 723 |
| Census Tract 9595 | 3,463 | 166.0 | 21 |
| Census Tract 9591 | 3,444 | 133.1 | 26 |
| Census Tract 9594 | 3,333 | 136.2 | 24 |
| Census Tract 9596 | 3,040 | 162.7 | 19 |
| Census Tract 9592 | 2,775 | 153.7 | 18 |
Related places
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.