Marshall County GIS Maps
Marshall County, Illinois, has 11,742 residents across 13,213 parcels and covers 386.8 square miles. The population declined 7.1% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Marshall County is 17123.
Henry is the county's largest population center. Marshall County also includes 8 zip codes, 7 public school districts and 30 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 parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Marshall County Trends
- Population
- 11,742▾
- Median Home Value
- $137,800▴
- K-12 Enrollment
- 3,949▾
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.
Marshall 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.
Marshall County Parcels
Marshall County has 13,213 mapped parcels covering 252,452 acres. The median lot size is 25.88 acres. 3,946 parcels are 10 acres or larger. The records carry 8,253 distinct owner names. Owner names and lot sizes are on nearly every parcel. Site addresses reach 61.3%. Browse the interactive Marshall County Parcel viewer here.
Marshall County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 13,213 | 100% |
| Owner name | 12,974 | 98.2% |
| Owner mailing address | 0 | 0% |
| Site address | 8,106 | 61.3% |
| Land use code | 13,213 | 100% |
| Land use description | 0 | 0% |
| Assessed value | 0 | 0% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 13,213 | 100% |
| Parcel boundary | 13,213 | 100% |
| Download all Marshall County parcels. | ||
Field coverage measured across all Marshall County parcel records.
Marshall County Population
Marshall County had 11,742 residents in 2020. That was 7.1% lower than in 2010. Marshall County had 1,438 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 30 people per square mile. Some of the county's most populated postal areas include Henry, Lacon and Toluca.
Population Trend in Marshall County IL
Marshall County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Marshall County Zip Codes
Marshall County has 8 zip codes. Some of the county's most populated zip codes include Henry (61537), Lacon (61540) and Toluca (61369). Henry is the largest zip by population, with about 2,807 residents or 24% of the county total. Together, the three largest zips account for about 61% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Marshall County IL
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 61537 | Henry | 2,807 | ▾ -5.6% |
| 61540 | Lacon | 2,741 | ▾ -6% |
| 61369 | Toluca | 1,586 | ▾ -7.3% |
| 61565 | Lacon | 1,409 | ▾ -6.3% |
| 61375 | Varna | 1,095 | ▾ -5.3% |
| Download all zip code data | |||
Marshall County Zip Code populations and trends per most recent census data.
Marshall County Demographics
Marshall County has a median age of 45.9, which makes the county a little older than Illinois overall. About 21.2% of residents are under 18, while 23.6% 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 27.2% of the population, which points to a solid working-age base. About 18.7% 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 Marshall County IL
Median Age
45.9
Under 18
21.2%
Age 65+
23.6%
Bachelor's+
18.7%
Marshall County School Districts
Marshall County is served by 7 public school districts with 3,949 students enrolled in 2024. The largest districts on the county map are Fieldcrest Community Unit 6, Putnam County Community Unit 535 and Midland Community Unit 7. Those three districts account for about 58% 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 Marshall County IL
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Fieldcrest Community Unit School District 6 | 862 | 21.8% | ▾ -0.8% |
| Putnam County Community Unit School District 535 | 773 | 19.6% | ▴ 0.9% |
| Midland Community Unit School District 7 | 657 | 16.6% | ▾ -2.7% |
| Princeville Community Unit School District 326 | 642 | 16.3% | ▾ -0.3% |
| Henry-Senachwine Consolidated Unit School District 5 | 534 | 13.5% | ▾ -4.5% |
| Download all school district data | |||
Marshall County school district enrollment and trends per most recent NCES reporting data.
Marshall County Housing & Real Estate
Marshall County has a median home value of $137,800 and a median gross rent of $767. About 80% 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 $175,500 and homes spent about 55 days on the market.
Marshall County Housing Mix
Marshall County housing mix: owner, renter and vacant units.
Marshall County Housing Trends
Marshall County median home value and rent trend (last 5 years).
Businesses in Marshall County, IL
Marshall County has 518 business listings across 198 categories. The largest categories in Marshall County business listings are Churches & Religious Organizations (21, 4.1%), Bars & Nightlife (14, 2.7%), and Parks & Recreation (11, 2.1%). The full Marshall County business listings dataset includes names, categories, addresses and contact details where available. Marshall County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Marshall County, IL
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 21 | 4.1% |
| Bars & Nightlife | 14 | 2.7% |
| Parks & Recreation | 11 | 2.1% |
| Post Offices | 11 | 2.1% |
| Public And Government Association | 9 | 1.7% |
| Propane Supplier | 9 | 1.7% |
| Discount Store | 9 | 1.7% |
| ATMs | 9 | 1.7% |
| Banks & Credit Unions | 8 | 1.5% |
| Farm | 8 | 1.5% |
Marshall County Business Listings
| Business | Category | City |
|---|---|---|
| Fluffers | Adult Entertainment | Sparland |
| Heritage Tractor | Agricultural Service | Lacon |
| Marshall County Airport (C75) | Airport | Lacon |
| Henry Community Ambulance Services | Ambulance And Ems Services | Henry |
| Club LaCon | American Restaurants | Lacon |
| The Ark | Animal Shelters | Lacon |
| 5th Street Revivals | Antique Store | Lacon |
| Firenock | Archery Shop | Henry |
| Fire Maple Pottery | Art Gallery | Lacon |
| LibertyX Bitcoin ATM | ATMs | Henry |
| Download Marshall County business listings | ||
Marshall County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Marshall County Basemaps
Marshall 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 Marshall County Data Package
This page shows a preview of what's included in the Marshall 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 parcels, 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 Marshall County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.