Stephenson County GIS Maps
Stephenson County, Illinois, has 44,630 residents and covers 564.6 square miles. The population declined 6.5% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Stephenson County is 17177.
Freeport is the county's largest population center. Stephenson County also includes 14 zip codes, 11 public school districts and 34 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.
Stephenson County Trends
- Population
- 44,630▾
- Median Home Value
- $127,500▴
- K-12 Enrollment
- 10,495▴
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.
Stephenson 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.
Stephenson County Population
Stephenson County had 44,630 residents in 2020. That was 6.5% lower than in 2010. Stephenson County had 4,349 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 79 people per square mile. Some of the county's most populated postal areas include Freeport, Lena and Davis.
Population Trend in Stephenson County IL
Stephenson County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Stephenson County Zip Codes
Stephenson County has 14 zip codes. Some of the county's most populated zip codes include Freeport (61032), Lena (61048) and Davis (61019). Freeport is the largest zip by population, with about 29,110 residents or 65% of the county total. Together, the three largest zips account for about 82% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Stephenson County IL
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 61032 | Freeport | 29,110 | ▾ -8% |
| 61048 | Lena | 4,081 | ▾ -6.4% |
| 61019 | Davis | 3,622 | ▴ 2% |
| 61062 | Pearl City | 1,871 | ▾ -5.6% |
| 61060 | Orangeville | 1,387 | ▾ -3.1% |
| Download all zip code data | |||
Stephenson County Zip Code populations and trends per most recent census data.
Stephenson County Demographics
Stephenson County has a median age of 45.2, which makes the county a little older than Illinois overall. About 21.3% of residents are under 18, while 23.9% 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 26.2% of the population, which points to a solid working-age base. About 21.7% of adults have a bachelor's degree or higher, above the statewide figure of 37.2%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Stephenson County IL
Median Age
45.2
Under 18
21.3%
Age 65+
23.9%
Bachelor's+
21.7%
Stephenson County School Districts
Stephenson County is served by 11 public school districts with 10,495 students enrolled in 2024. The largest districts on the county map are Freeport 145, Winnebago Community Unit 323 and Pecatonica Community Unit 321. Those three districts account for about 56% 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 Stephenson County IL
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Freeport School District 145 | 3,703 | 35.3% | ▴ 1.8% |
| Winnebago Community Unit School District 323 | 1,267 | 12.1% | ▾ -0.1% |
| Pecatonica Community Unit School District 321 | 889 | 8.5% | ▾ -1.7% |
| Lena-Winslow Community Unit School District 202 | 817 | 7.8% | ▾ -2% |
| Dakota Community Unit School District 201 | 754 | 7.2% | ▴ 0.7% |
| Download all school district data | |||
Stephenson County school district enrollment and trends per most recent NCES reporting data.
Stephenson County Housing & Real Estate
Stephenson County has a median home value of $127,500 and a median gross rent of $764. About 71% 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 $190,675 and homes spent about 46 days on the market.
Stephenson County Housing Mix
Stephenson County housing mix: owner, renter and vacant units.
Stephenson County Housing Trends
Stephenson County median home value and rent trend (last 5 years).
Businesses in Stephenson County, IL
Stephenson County has 1,945 business listings across 472 categories. The largest categories in Stephenson County business listings are Churches & Religious Organizations (84, 4.3%), Auto Repair (46, 2.4%), and Insurance Agencies (34, 1.7%). The full Stephenson County business listings dataset includes names, categories, addresses and contact details where available. Stephenson County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Stephenson County, IL
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 84 | 4.3% |
| Auto Repair | 46 | 2.4% |
| Insurance Agencies | 34 | 1.7% |
| Parks & Recreation | 28 | 1.4% |
| Gas Stations | 27 | 1.4% |
| Beauty Salons | 26 | 1.3% |
| Farm | 25 | 1.3% |
| Banks & Credit Unions | 25 | 1.3% |
| Contractors | 24 | 1.2% |
| Public And Government Association | 21 | 1.1% |
Stephenson County Business Listings
| Business | Category | City |
|---|---|---|
| City of Freeport | Accommodation | Freeport |
| Lucas Group Financial Advisors and CPAs | Accountant | Freeport |
| Jane Addams Trail | Active Life | Freeport |
| M45 Marketing | Advertising Agency | Freeport |
| Pearl City Elevator Inc | Agricultural Cooperatives | Pearl City |
| Heritage Tractor | Agricultural Service | Freeport |
| Baileyville Co-Op | Agriculture | Baileyville |
| Lena Coop | Agriculture Association | Lena |
| All American Cleaning & Restoration Inc | Air Duct Cleaning Service | Freeport |
| Albertus Airport | Airport | Freeport |
| Download Stephenson County business listings | ||
Stephenson County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Stephenson County Basemaps
Stephenson 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 Stephenson County Data Package
This page shows a preview of what's included in the Stephenson 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 Stephenson County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.