Clinton County, IL Demographics
Clinton County, IL is the 38th most populous of 102 counties in Illinois, with 36,903 residents across 474 square miles. That is about 78 people per square mile.
At the 2020 census
| Population | 36,903 |
|---|---|
| Land area | 474 sq mi |
| Density | 78 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Clinton 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: Clinton County, IL
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Clinton County, IL — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Clinton County, IL
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9003 | 6,928 | 56.1 | 123 |
| Census Tract 9006.02 | 6,900 | 72.5 | 95 |
| Census Tract 9001 | 6,512 | 30.5 | 213 |
| Census Tract 9005 | 5,664 | 69.9 | 81 |
| Census Tract 9004.03 | 3,921 | 28.3 | 139 |
| Census Tract 9006.01 | 2,460 | 30.8 | 80 |
| Census Tract 9002 | 1,910 | 71.7 | 27 |
| Census Tract 9004.04 | 1,403 | 33.6 | 42 |
| Census Tract 9004.01 | 1,201 | 80.5 | 15 |
Related places
Other counties nearby
Nearest counties
Metro areas containing Clinton 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.