Peoria County GIS Maps
Peoria County, Illinois, has 181,830 residents and covers 618.7 square miles. The population declined 2.5% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Peoria County is 17143.
Peoria is the county's largest population center. Peoria County also includes 25 zip codes, 10 public school districts and 38 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Peoria County Trends
- Population
- 181,830▾
- Median Home Value
- $152,600▴
- K-12 Enrollment
- 24,807▴
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Peoria County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Peoria County Population
Peoria County had 181,830 residents in 2020. That was 2.5% lower than in 2010. Peoria County had 1,603 fewer people in 2020 than it did in 2000, which points to a long-term population decline. The county is fairly spread out, with about 294 people per square mile. Some of the county's most populated postal areas include Peoria, Peoria and Peoria.
Population Trend in Peoria County IL
Peoria County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Peoria County Zip Codes
Peoria County has 25 zip codes. Some of the county's most populated zip codes include Peoria (61604), Peoria (61614) and Peoria (61615). Peoria is the largest zip by population, with about 29,344 residents or 16% of the county total. Together, the three largest zips account for about 44% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Peoria County IL
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 61604 | Peoria | 29,344 | ▾ -7.3% |
| 61614 | Peoria | 27,119 | ▾ -1.8% |
| 61615 | Peoria | 24,314 | ▴ 8.4% |
| 61603 | Peoria | 15,503 | ▾ -11.9% |
| 61605 | Peoria | 14,049 | ▾ -13.8% |
| Download all zip code data | |||
Peoria County Zip Code populations and trends per most recent census data.
Peoria County Demographics
Peoria County has a median age of 38.1, which makes the county a little younger than Illinois overall. About 23.9% of residents are under 18, while 17.9% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 31.3% of the population, which points to a solid working-age base. About 34.5% of adults have a bachelor's degree or higher, above the statewide figure of 37.2%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.
Key Demographics for Peoria County IL
Median Age
38.1
Under 18
23.9%
Age 65+
17.9%
Bachelor's+
34.5%
Peoria County School Districts
Peoria County is served by 10 public school districts with 24,807 students enrolled in 2024. The largest districts on the county map are Peoria 150, Dunlap Community Unit 323 and Illinois Valley Central Unit 321. Those three districts account for about 80% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Peoria County IL
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Peoria School District 150 | 12,913 | 52.1% | ▴ 1.6% |
| Dunlap Community Unit School District 323 | 4,837 | 19.5% | ▴ 1% |
| Illinois Valley Central Unit School District 321 | 2,071 | 8.3% | ▾ -1.1% |
| Farmington Central Community Unit School District 265 | 1,269 | 5.1% | ▴ 2.7% |
| Illini Bluffs Community Unit School District 327 | 855 | 3.4% | ▾ -1.5% |
| Download all school district data | |||
Peoria County school district enrollment and trends per most recent NCES reporting data.
Peoria County Housing & Real Estate
Peoria County has a median home value of $152,600 and a median gross rent of $946. About 67% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Illinois median, while rents come in below the state average. In March 2026, the median listing price was $156,700 and homes spent about 52 days on the market.
Peoria County Housing Mix
Peoria County housing mix: owner, renter and vacant units.
Peoria County Housing Trends
Peoria County median home value and rent trend (last 5 years).
Businesses in Peoria County, IL
Peoria County has 8,487 business listings across 828 categories. The largest categories in Peoria County business listings are Medical Offices (222, 2.6%), Churches & Religious Organizations (200, 2.4%), and Insurance Agencies (129, 1.5%). The full Peoria County business listings dataset includes names, categories, addresses and contact details where available. Peoria County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Peoria County, IL
| Category | Businesses | Share |
|---|---|---|
| Medical Offices | 222 | 2.6% |
| Churches & Religious Organizations | 200 | 2.4% |
| Insurance Agencies | 129 | 1.5% |
| Beauty Salons | 112 | 1.3% |
| ATMs | 110 | 1.3% |
| Community & Nonprofits | 106 | 1.2% |
| Landmark And Historical Building | 106 | 1.2% |
| Gas Stations | 102 | 1.2% |
| Real Estate Agents | 100 | 1.2% |
| Medical Center | 90 | 1.1% |
Peoria County Business Listings
| Business | Category | City |
|---|---|---|
| J.A.M. Screen Printing | 3D Printing Service | West Peoria |
| OSF Inpatient Rehabilitation | Abuse And Addiction Treatment | Peoria |
| Brandywine Crossing Apartments | Accommodation | Peoria |
| Richard L. Renner Certified Public Accountant | Accountant | Peoria |
| Kellogg Executive 9 | Active Life | Peoria |
| Dr. Olson Health | Acupuncture | Peoria |
| Drug Detox Peoria City | Addiction Rehabilitation Center | Peoria City |
| The Center for Youth and Family Solutions | Adoption Services | Peoria |
| The Green Door Video-Erotic Boutique | Adult Entertainment | West Peoria |
| Kids First Community | Advertising Agency | Bellevue |
| Download Peoria County business listings | ||
Peoria County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Peoria County Basemaps
Peoria County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Peoria County Data Package
This page shows a preview of what's included in the Peoria County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Peoria County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.