Will County GIS Maps
Will County, Illinois, has 696,355 residents and covers 835.9 square miles. The population grew 2.8% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Will County is 17197.
Joliet is the county's largest population center. Will County also includes 30 zip codes, 11 public school districts and 47 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.
Will County Trends
- Population
- 696,355▴
- Median Home Value
- $298,000▴
- K-12 Enrollment
- 109,535▾
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.
Will 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.
Will County Population
Will County had 696,355 residents in 2020. That was 2.8% higher than in 2010. Will County added 194,089 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 833 people per square mile. Some of the county's most populated postal areas include Bolingbrook, Joliet and Plainfield.
Population Trend in Will County IL
Will County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Will County Zip Codes
Will County has 30 zip codes. Some of the county's most populated zip codes include Bolingbrook (60440), Joliet (60435) and Plainfield (60586). Bolingbrook is the largest zip by population, with about 52,031 residents or 7% of the county total. Together, the three largest zips account for about 21% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Will County IL
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 60440 | Bolingbrook | 52,031 | ▾ -1.7% |
| 60435 | Joliet | 48,927 | ▴ 0.1% |
| 60586 | Plainfield | 47,212 | ▴ 2.1% |
| 60564 | Fox Valley | 45,616 | ▴ 10.4% |
| 60446 | Romeoville | 40,465 | ▴ 1.7% |
| Download all zip code data | |||
Will County Zip Code populations and trends per most recent census data.
Will County Demographics
Will County has a median age of 38.9, which is close to the Illinois average. About 24% of residents are under 18, while 14.1% 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 32.6% of the population, which points to a solid working-age base. About 36.5% of adults have a bachelor's degree or higher, above the statewide figure of 37.2%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.
Key Demographics for Will County IL
Median Age
38.9
Under 18
24%
Age 65+
14.1%
Bachelor's+
36.5%
Will County School Districts
Will County is served by 11 public school districts with 109,535 students enrolled in 2024. The largest districts on the county map are Indian Prairie Community Unit 204, Plainfield 202 and Oswego Community Unit 308. Those three districts account for about 62% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Will County IL
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Indian Prairie Community Unit School District 204 | 26,108 | 23.8% | ▴ 0.6% |
| Plainfield School District 202 | 24,556 | 22.4% | ▾ -0.5% |
| Oswego Community Unit School District 308 | 16,766 | 15.3% | ▾ -0.5% |
| Naperville Community Unit District 203 | 16,047 | 14.7% | ▾ -0.1% |
| Valley View Community Unit School District 365U | 14,710 | 13.4% | ▾ -0.9% |
| Download all school district data | |||
Will County school district enrollment and trends per most recent NCES reporting data.
Will County Housing & Real Estate
Will County has a median home value of $298,000 and a median gross rent of $1,413. About 83% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Illinois median, while rents come in above the state average. In March 2026, the median listing price was $397,425 and homes spent about 34 days on the market.
Will County Housing Mix
Will County housing mix: owner, renter and vacant units.
Will County Housing Trends
Will County median home value and rent trend (last 5 years).
Businesses in Will County, IL
Will County has 24,011 business listings across 1,064 categories. The largest categories in Will County business listings are Real Estate Agents (431, 1.8%), Auto Repair (410, 1.7%), and Parks & Recreation (407, 1.7%). The full Will County business listings dataset includes names, categories, addresses and contact details where available. Will County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Will County, IL
| Category | Businesses | Share |
|---|---|---|
| Real Estate Agents | 431 | 1.8% |
| Auto Repair | 410 | 1.7% |
| Parks & Recreation | 407 | 1.7% |
| Churches & Religious Organizations | 391 | 1.6% |
| Contractors | 363 | 1.5% |
| Medical Offices | 360 | 1.5% |
| Insurance Agencies | 314 | 1.3% |
| Beauty Salons | 284 | 1.2% |
| Banks & Credit Unions | 270 | 1.1% |
| Hair Salons | 266 | 1.1% |
Will County Business Listings
| Business | Category | City |
|---|---|---|
| Allos Technologies, LLC | 3D Printing Service | Lockport |
| US Minerals - Black Diamond Abrasives - Corporate Headquarters | Abrasives Supplier | Tinley Park |
| Alden Estates of Shorewood | Abuse And Addiction Treatment | Shorewood |
| Lewis University Bookstore | Academic Bookstore | Romeoville |
| Clean Juice | Acai Bowls | Naperville |
| River Run at Naperville Luxury Apartments | Accommodation | Naperville |
| Eberhart Accounting Services | Accountant | Bolingbrook |
| Peotone Sportsmen's Club | Active Life | Peotone |
| Holistic Science Pain Clinic | Acupuncture | Joliet |
| Drug Detox Lockport | Addiction Rehabilitation Center | Lockport |
| Download Will County business listings | ||
Will County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Will County Basemaps
Will 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 Will County Data Package
This page shows a preview of what's included in the Will 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 Will County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.