Lake County GIS Maps
Lake County, Illinois, has 714,342 residents and covers 443.9 square miles. The population grew 1.5% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Lake County is 17097.
Waukegan is the county's largest population center. Lake County also includes 28 zip codes, 6 public school districts and 32 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.
Lake County Trends
- Population
- 714,342▴
- Median Home Value
- $326,600▴
- K-12 Enrollment
- 41,274▾
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.
Lake 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.
Lake County Population
Lake County had 714,342 residents in 2020. That was 1.5% higher than in 2010. Lake County added 69,986 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 1,609 people per square mile. Some of the county's most populated postal areas include Waukegan, Round Lake and Lake Zurich.
Population Trend in Lake County IL
Lake County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Lake County Zip Codes
Lake County has 28 zip codes. Some of the county's most populated zip codes include Waukegan (60085), Round Lake (60073) and Lake Zurich (60047). Waukegan is the largest zip by population, with about 71,609 residents or 10% of the county total. Together, the three largest zips account for about 25% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Lake County IL
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 60085 | Waukegan | 71,609 | ▾ -0.1% |
| 60073 | Round Lake | 61,721 | ▴ 2.9% |
| 60047 | Lake Zurich | 43,944 | ▴ 5.5% |
| 60089 | Buffalo Grove | 43,227 | ▴ 4.1% |
| 60031 | Gurnee | 37,650 | ▾ -0.8% |
| Download all zip code data | |||
Lake County Zip Code populations and trends per most recent census data.
Lake County Demographics
Lake County has a median age of 38.9, which is close to the Illinois average. About 23.6% of residents are under 18, while 15.3% 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 30.6% of the population, which points to a solid working-age base. About 47% 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 Lake County IL
Median Age
38.9
Under 18
23.6%
Age 65+
15.3%
Bachelor's+
47%
Lake County School Districts
Lake County is served by 6 public school districts with 41,274 students enrolled in 2024. The largest districts on the county map are Waukegan Community Unit 60, Barrington Community Unit 220 and Round Lake Community Unit 116. Those three districts account for about 67% 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 Lake County IL
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Waukegan Community Unit School District 60 | 13,640 | 33% | ▾ -0.2% |
| Barrington Community Unit School District 220 | 7,936 | 19.2% | ▾ -1.1% |
| Round Lake Community Unit School District 116 | 6,103 | 14.8% | ▾ -1.4% |
| Lake Zurich Community Unit School District 95 | 5,772 | 14% | ▴ 1.2% |
| Wauconda Community Unit School District 118 | 4,186 | 10.1% | ▾ -2.2% |
| Download all school district data | |||
Lake County school district enrollment and trends per most recent NCES reporting data.
Lake County Housing & Real Estate
Lake County has a median home value of $326,600 and a median gross rent of $1,434. About 74% 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 $467,450 and homes spent about 28 days on the market.
Lake County Housing Mix
Lake County housing mix: owner, renter and vacant units.
Lake County Housing Trends
Lake County median home value and rent trend (last 5 years).
Businesses in Lake County, IL
Lake County has 29,806 business listings across 1,118 categories. The largest categories in Lake County business listings are Medical Offices (871, 2.9%), Real Estate Agents (680, 2.3%), and Parks & Recreation (459, 1.5%). The full Lake County business listings dataset includes names, categories, addresses and contact details where available. Lake County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Lake County, IL
| Category | Businesses | Share |
|---|---|---|
| Medical Offices | 871 | 2.9% |
| Real Estate Agents | 680 | 2.3% |
| Parks & Recreation | 459 | 1.5% |
| Contractors | 438 | 1.5% |
| Auto Repair | 378 | 1.3% |
| Churches & Religious Organizations | 369 | 1.2% |
| Insurance Agencies | 361 | 1.2% |
| Beauty Salons | 357 | 1.2% |
| ATMs | 337 | 1.1% |
| Gyms & Fitness | 312 | 1.0% |
Lake County Business Listings
| Business | Category | City |
|---|---|---|
| Relish Brand | 3D Printing Service | Grayslake |
| Planned Parenthood - Waukegan Health Center | Abortion Clinic | Waukegan |
| Abrasive Brush | Abrasives Supplier | Zion |
| Elevate Care Waukegan | Abuse And Addiction Treatment | Waukegan |
| Forest Greens Juice Bar | Acai Bowls | Lake Bluff |
| Fox Crest Apartments | Accommodation | Waukegan |
| Cote Wright Tax & Accounting | Accountant | Gurnee |
| Zumbbao Fitness | Active Life | Mundelein |
| Acucenter Pain Clinic | Acupuncture | Lake Forest |
| Northern Illinois Council | Addiction Rehabilitation Center | Waukegan |
| Download Lake County business listings | ||
Lake County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Lake County Basemaps
Lake 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 Lake County Data Package
This page shows a preview of what's included in the Lake 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 Lake County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.