Putnam County, IL Demographics
Putnam County, IL is the 94th most populous of 102 counties in Illinois, with 5,637 residents across 160 square miles. That is about 35 people per square mile.
At the 2020 census
| Population | 5,637 |
|---|---|
| Land area | 160 sq mi |
| Density | 35 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Putnam 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: Putnam County, IL
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Putnam County, IL — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Putnam County, IL
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9546 | 2,823 | 112.9 | 25 |
| Census Tract 9545 | 2,814 | 47.2 | 60 |
Related places
Other counties nearby
Nearest counties
Metro areas containing Putnam 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.