Sangamon County GIS Maps
Sangamon County, Illinois, has 196,343 residents and covers 868.3 square miles. The population declined 0.6% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Sangamon County is 17167.
Springfield is the county's largest population center. Sangamon County also includes 26 zip codes, 16 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.
Sangamon County Trends
- Population
- 196,343▾
- Median Home Value
- $170,300▴
- K-12 Enrollment
- 30,507▾
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.
Sangamon 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.
Sangamon County Population
Sangamon County had 196,343 residents in 2020. That was 0.6% lower than in 2010. Sangamon County added 7,392 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 226 people per square mile. Some of the county's most populated postal areas include Springfield, Springfield and Springfield.
Population Trend in Sangamon County IL
Sangamon County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Sangamon County Zip Codes
Sangamon County has 26 zip codes. Some of the county's most populated zip codes include Springfield (62704), Springfield (62702) and Springfield (62703). Springfield is the largest zip by population, with about 39,157 residents or 20% of the county total. Together, the three largest zips account for about 52% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Sangamon County IL
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 62704 | Springfield | 39,157 | ▾ -1.7% |
| 62702 | Springfield | 33,712 | ▾ -9.6% |
| 62703 | Springfield | 28,344 | ▾ -6.6% |
| 62711 | Springfield | 18,115 | ▴ 18% |
| 62629 | Chatham | 15,255 | ▴ 17.8% |
| Download all zip code data | |||
Sangamon County Zip Code populations and trends per most recent census data.
Sangamon County Demographics
Sangamon County has a median age of 40.8, which makes the county a little older than Illinois overall. About 22% of residents are under 18, while 18.9% 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% of the population, which points to a solid working-age base. About 35.1% 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 Sangamon County IL
Median Age
40.8
Under 18
22%
Age 65+
18.9%
Bachelor's+
35.1%
Sangamon County School Districts
Sangamon County is served by 16 public school districts with 30,507 students enrolled in 2024. The largest districts on the county map are Springfield 186, Ball-Chatham Community Unit 5 and Rochester Community Unit 3A. Those three districts account for about 64% 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 Sangamon County IL
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Springfield School District 186 | 13,014 | 42.7% | ▴ 0.7% |
| Ball-Chatham Community Unit School District 5 | 4,516 | 14.8% | ▾ -2.5% |
| Rochester Community Unit School District 3A | 2,012 | 6.6% | ▾ -1.7% |
| Williamsville Community Unit School District 15 | 1,458 | 4.8% | ▴ 0.3% |
| Pleasant Plains Community Unit School District 8 | 1,294 | 4.2% | ▴ 0.8% |
| Download all school district data | |||
Sangamon County school district enrollment and trends per most recent NCES reporting data.
Sangamon County Housing & Real Estate
Sangamon County has a median home value of $170,300 and a median gross rent of $954. 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 $199,900 and homes spent about 31 days on the market.
Sangamon County Housing Mix
Sangamon County housing mix: owner, renter and vacant units.
Sangamon County Housing Trends
Sangamon County median home value and rent trend (last 5 years).
Businesses in Sangamon County, IL
Sangamon County has 9,153 business listings across 842 categories. The largest categories in Sangamon County business listings are Medical Offices (354, 3.9%), Churches & Religious Organizations (195, 2.1%), and Community & Nonprofits (175, 1.9%). The full Sangamon County business listings dataset includes names, categories, addresses and contact details where available. Sangamon County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Sangamon County, IL
| Category | Businesses | Share |
|---|---|---|
| Medical Offices | 354 | 3.9% |
| Churches & Religious Organizations | 195 | 2.1% |
| Community & Nonprofits | 175 | 1.9% |
| Contractors | 117 | 1.3% |
| ATMs | 116 | 1.3% |
| Public And Government Association | 116 | 1.3% |
| Insurance Agencies | 112 | 1.2% |
| Auto Repair | 111 | 1.2% |
| Real Estate Agents | 108 | 1.2% |
| Beauty Salons | 100 | 1.1% |
Sangamon County Business Listings
| Business | Category | City |
|---|---|---|
| Springfield Clinic Sherman Rehabilitation Services | Abuse And Addiction Treatment | Sherman |
| Lincoln Residence Hall | Accommodation | Springfield |
| JLW Tax & Bookkeeping | Accountant | Springfield |
| Energia | Active Life | Chatham |
| Solstice Acupuncture & Apothecary | Acupuncture | Springfield |
| Drug Rehab Springfield | Addiction Rehabilitation Center | Springfield |
| Diligent Search Services | Adoption Services | Springfield |
| Outdoor Cover Warehouse | Adventure Sports Center | Springfield |
| Hodas and Associates | Advertising Agency | Springfield |
| Travelers Kitchen | African Restaurant | Springfield |
| Download Sangamon County business listings | ||
Sangamon County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Sangamon County Basemaps
Sangamon 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 Sangamon County Data Package
This page shows a preview of what's included in the Sangamon 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 Sangamon County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.