Mason County, IL Demographics
Mason County, IL is the 81st most populous of 102 counties in Illinois, with 13,086 residents across 539 square miles. That is about 24 people per square mile.
At the 2020 census
| Population | 13,086 |
|---|---|
| Land area | 539 sq mi |
| Density | 24 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Mason 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: Mason County, IL
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Mason County, IL — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Mason County, IL
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9565 | 2,990 | 3.1 | 959 |
| Census Tract 9563 | 2,695 | 73.5 | 37 |
| Census Tract 9568 | 2,131 | 4.6 | 458 |
| Census Tract 9564 | 1,858 | 93.2 | 20 |
| Census Tract 9566 | 1,762 | 162.8 | 11 |
| Census Tract 9567 | 1,650 | 202.0 | 8 |
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.