Jersey County GIS Maps
Jersey County, Illinois, has 21,512 residents and covers 369.3 square miles. The population declined 6.4% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Jersey County is 17083.
Jerseyville is the county's largest population center. Jersey County also includes 8 zip codes, 3 public school districts and 22 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.
Jersey County Trends
- Population
- 21,512▾
- Median Home Value
- $168,800▴
- K-12 Enrollment
- 9,040▾
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.
Jersey 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.
Jersey County Population
Jersey County had 21,512 residents in 2020. That was 6.4% lower than in 2010. Jersey County had 156 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 58 people per square mile. Some of the county's most populated postal areas include Jerseyville, Brighton and Grafton.
Population Trend in Jersey County IL
Jersey County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Jersey County Zip Codes
Jersey County has 8 zip codes. Some of the county's most populated zip codes include Jerseyville (62052), Brighton (62012) and Grafton (62037). Jerseyville is the largest zip by population, with about 12,503 residents or 58% of the county total. Together, the three largest zips account for about 96% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Jersey County IL
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 62052 | Jerseyville | 12,503 | ▾ -3.8% |
| 62012 | Brighton | 6,373 | ▾ -4.2% |
| 62037 | Grafton | 1,779 | ▾ -10.7% |
| 62028 | Elsah | 1,148 | ▾ -10% |
| 62063 | Medora | 1,144 | ▾ -5.8% |
| Download all zip code data | |||
Jersey County Zip Code populations and trends per most recent census data.
Jersey County Demographics
Jersey County has a median age of 43.2, which makes the county a little older than Illinois overall. About 19.9% of residents are under 18, while 20.1% 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 28% of the population, which points to a solid working-age base. About 20.5% 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 Jersey County IL
Median Age
43.2
Under 18
19.9%
Age 65+
20.1%
Bachelor's+
20.5%
Jersey County School Districts
Jersey County is served by 3 public school districts with 9,040 students enrolled in 2024. The largest districts on the county map are Alton Community Unit 11, Jersey Community Unit 100 and Southwestern Community Unit 9. Those three districts account for about 100% 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 Jersey County IL
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Alton Community Unit School District 11 | 5,526 | 61.1% | ▾ -2.4% |
| Jersey Community Unit School District 100 | 2,365 | 26.2% | ▾ -2.8% |
| Southwestern Community Unit School District 9 | 1,149 | 12.7% | ▾ -1.1% |
| Download all school district data | |||
Jersey County school district enrollment and trends per most recent NCES reporting data.
Jersey County Housing & Real Estate
Jersey County has a median home value of $168,800 and a median gross rent of $794. About 78% 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 $236,225 and homes spent about 108 days on the market.
Jersey County Housing Mix
Jersey County housing mix: owner, renter and vacant units.
Jersey County Housing Trends
Jersey County median home value and rent trend (last 5 years).
Businesses in Jersey County, IL
Jersey County has 874 business listings across 327 categories. The largest categories in Jersey County business listings are Churches & Religious Organizations (17, 1.9%), Landmark And Historical Building (16, 1.8%), and Bars & Nightlife (12, 1.4%). The full Jersey County business listings dataset includes names, categories, addresses and contact details where available. Jersey County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Jersey County, IL
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 17 | 1.9% |
| Landmark And Historical Building | 16 | 1.8% |
| Bars & Nightlife | 12 | 1.4% |
| Farm | 12 | 1.4% |
| Insurance Agencies | 12 | 1.4% |
| Auto Repair | 12 | 1.4% |
| Parks & Recreation | 11 | 1.3% |
| Elementary School | 10 | 1.1% |
| Community & Nonprofits | 10 | 1.1% |
| Contractors | 10 | 1.1% |
Jersey County Business Listings
| Business | Category | City |
|---|---|---|
| Fisch Houz Llc | Accommodation | Grafton |
| Droege and Associates | Accountant | Jerseyville |
| Aeries Resort - Ziplin | Active Life | Grafton |
| TriCounty FS, INC. | Agricultural Service | Jerseyville |
| Sievers Equipment Co. | Agriculture | Jerseyville |
| Survival Flight 5 | Ambulance And Ems Services | Jerseyville |
| The Diner Grill | American Restaurants | Jerseyville |
| Grafton Zipline | Amusement Park | Grafton |
| William Thom, MD | Anesthesiologist | Jerseyville |
| Riverbend Humane Society No-Kill Animal Shelter | Animal Shelters | Jerseyville |
| Download Jersey County business listings | ||
Jersey County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Jersey County Basemaps
Jersey 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 Jersey County Data Package
This page shows a preview of what's included in the Jersey 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 Jersey County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.