Alexander County GIS Maps
Alexander County, Illinois, has 5,240 residents and covers 235.5 square miles. The population declined 36.4% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Alexander County is 17003.
Cairo is the county's largest population center. Alexander County also includes 6 zip codes, 5 public school districts and 23 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.
Alexander County Trends
- Population
- 5,240▾
- Median Home Value
- $58,700▴
- K-12 Enrollment
- 1,602▾
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.
Alexander 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.
Alexander County Population
Alexander County had 5,240 residents in 2020. That was 36.4% lower than in 2010. Alexander County had 4,350 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 22 people per square mile. Some of the county's most populated postal areas include Cairo, Tamms and Thebes.
Population Trend in Alexander County IL
Alexander County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Alexander County Zip Codes
Alexander County has 6 zip codes. Some of the county's most populated zip codes include Cairo (62914), Tamms (62988) and Thebes (62990). Cairo is the largest zip by population, with about 1,929 residents or 37% of the county total. Together, the three largest zips account for about 79% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Alexander County IL
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 62914 | Cairo | 1,929 | ▾ -38.7% |
| 62988 | Tamms | 1,256 | ▾ -40.5% |
| 62990 | Thebes | 940 | ▾ -15.2% |
| 62957 | Mc Clure | 733 | ▾ -26.4% |
| 62969 | Olive Branch | 350 | ▾ -52.1% |
| Download all zip code data | |||
Alexander County Zip Code populations and trends per most recent census data.
Alexander County Demographics
Alexander County has a median age of 45.8, which makes the county a little older than Illinois overall. About 21.7% of residents are under 18, while 24.2% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 65 and over at about 24.2% of the population, which points to an older population profile. About 12.6% of adults have a bachelor's degree or higher, above the statewide figure of 37.2%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.
Key Demographics for Alexander County IL
Median Age
45.8
Under 18
21.7%
Age 65+
24.2%
Bachelor's+
12.6%
Alexander County School Districts
Alexander County is served by 5 public school districts with 1,602 students enrolled in 2024. The largest districts on the county map are Meridian Community Unit 101, Century Community Unit 100 and Egyptian Community Unit 5. Those three districts account for about 66% 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 Alexander County IL
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Meridian Community Unit School District 101 | 419 | 26.2% | ▾ -5.2% |
| Century Community Unit School District 100 | 331 | 20.7% | ▴ 0.6% |
| Egyptian Community Unit School District 5 | 304 | 19% | ▾ -3.5% |
| Cairo Community Unit School District 1 | 278 | 17.4% | ▾ -5.4% |
| Shawnee Community Unit School District 84 | 270 | 16.9% | ▾ -7.5% |
| Download all school district data | |||
Alexander County school district enrollment and trends per most recent NCES reporting data.
Alexander County Housing & Real Estate
Alexander County has a median home value of $58,700 and a median gross rent of $540. 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 $59,900 and homes spent about 28 days on the market.
Alexander County Housing Mix
Alexander County housing mix: owner, renter and vacant units.
Alexander County Housing Trends
Alexander County median home value and rent trend (last 5 years).
Businesses in Alexander County, IL
Alexander County has 219 business listings across 112 categories. The largest categories in Alexander County business listings are Churches & Religious Organizations (16, 7.3%), Post Offices (8, 3.7%), and Baptist Church (7, 3.2%). The full Alexander County business listings dataset includes names, categories, addresses and contact details where available. Alexander County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Alexander County, IL
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 16 | 7.3% |
| Post Offices | 8 | 3.7% |
| Baptist Church | 7 | 3.2% |
| Elementary School | 7 | 3.2% |
| Parks & Recreation | 6 | 2.7% |
| Landmark And Historical Building | 6 | 2.7% |
| American Restaurants | 5 | 2.3% |
| Police Department | 4 | 1.8% |
| River | 4 | 1.8% |
| Restaurants | 4 | 1.8% |
Alexander County Business Listings
| Business | Category | City |
|---|---|---|
| Cairo Regional Airport | Airport | Cairo |
| Alexander County Ambulance Service | Ambulance And Ems Services | Olive Branch |
| Kozy Korner Grill | American Restaurants | Olive Branch |
| AmeriGas | Appliance Store | Mc Clure |
| Grumpy quilter | Arts And Crafts | Cairo |
| Daystar Care Center | Assisted Living Facility | Cairo |
| Tim Caldwell - COUNTRY Financial representative | Auto Insurance | Tamms |
| Jones Service Station | Automotive | Olive Branch |
| Guetterman Motors Inc | Automotive Dealer | Cairo |
| R & R 4 Wheel Drive | Auto Repair | Mc Clure |
| Download Alexander County business listings | ||
Alexander County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Alexander County Basemaps
Alexander 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 Alexander County Data Package
This page shows a preview of what's included in the Alexander 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 Alexander County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.