Peoria County, IL Demographics
Peoria County, IL is the 12th most populous of 102 counties in Illinois, with 181,830 residents across 619 square miles. That is about 294 people per square mile.
At the 2020 census
| Population | 181,830 |
|---|---|
| Land area | 619 sq mi |
| Density | 294 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Peoria 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: Peoria County, IL
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Peoria County, IL — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Peoria County, IL
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 39 | 9,246 | 107.6 | 86 |
| Census Tract 34.04 | 8,402 | 4.0 | 2,094 |
| Census Tract 41.01 | 7,350 | 27.0 | 272 |
| Census Tract 31.01 | 5,432 | 2.4 | 2,303 |
| Census Tract 36.02 | 5,345 | 6.0 | 894 |
| Census Tract 46 | 5,052 | 8.1 | 625 |
| Census Tract 49.02 | 4,961 | 55.7 | 89 |
| Census Tract 45 | 4,892 | 12.0 | 406 |
| Census Tract 30 | 4,662 | 1.7 | 2,790 |
| Census Tract 23 | 4,618 | 1.3 | 3,654 |
| Census Tract 24 | 4,545 | 0.8 | 5,800 |
| Census Tract 40 | 4,443 | 92.5 | 48 |
| Census Tract 21 | 4,377 | 1.1 | 3,890 |
| Census Tract 44 | 4,365 | 1.3 | 3,484 |
| Census Tract 48.01 | 4,355 | 16.5 | 264 |
| Census Tract 34.02 | 4,276 | 8.8 | 485 |
| Census Tract 48.02 | 4,210 | 3.0 | 1,394 |
| Census Tract 32 | 4,142 | 1.2 | 3,361 |
| Census Tract 22 | 4,082 | 0.7 | 5,806 |
| Census Tract 27.02 | 3,901 | 1.1 | 3,603 |
| Census Tract 29 | 3,810 | 1.7 | 2,179 |
| Census Tract 27.01 | 3,757 | 1.2 | 3,214 |
| Census Tract 37 | 3,757 | 60.1 | 62 |
| Census Tract 42 | 3,570 | 1.9 | 1,922 |
| Census Tract 31.04 | 3,467 | 1.3 | 2,739 |
| Census Tract 16 | 3,444 | 0.8 | 4,120 |
| Census Tract 49.01 | 3,436 | 53.7 | 64 |
| Census Tract 25 | 3,399 | 0.6 | 5,620 |
| Census Tract 34.03 | 3,395 | 8.5 | 400 |
| Census Tract 28 | 3,280 | 1.7 | 1,904 |
| Census Tract 18 | 3,130 | 0.5 | 6,102 |
| Census Tract 41.02 | 3,086 | 2.6 | 1,172 |
| Census Tract 38 | 3,050 | 112.3 | 27 |
| Census Tract 33 | 3,021 | 2.8 | 1,080 |
| Census Tract 20 | 2,889 | 0.5 | 5,822 |
| Census Tract 36.01 | 2,815 | 5.1 | 552 |
| Census Tract 31.03 | 2,783 | 1.1 | 2,524 |
| Census Tract 9 | 2,723 | 0.8 | 3,417 |
| Census Tract 51 | 2,651 | 2.2 | 1,211 |
| Census Tract 6 | 2,560 | 0.9 | 3,002 |
| Census Tract 43 | 2,275 | 0.6 | 3,650 |
| Census Tract 50 | 1,994 | 0.5 | 3,702 |
| Census Tract 3 | 1,792 | 0.4 | 4,686 |
| Census Tract 13 | 1,745 | 0.5 | 3,585 |
| Census Tract 26 | 1,716 | 1.6 | 1,094 |
| Census Tract 15 | 1,628 | 0.8 | 1,947 |
| Census Tract 2 | 1,513 | 0.4 | 4,034 |
| Census Tract 12 | 1,467 | 0.6 | 2,653 |
| Census Tract 19 | 1,021 | 0.3 | 3,837 |
Related places
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Nearest counties
Metro areas containing Peoria 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.