Union County GIS Maps
Union County, Arkansas, has 39,054 residents and covers 1,039.2 square miles. The population declined 6.2% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Union County is 05139.
El Dorado is the county's largest population center. Union County also includes 8 zip codes, 5 public school districts and 31 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.
Union County Trends
- Population
- 39,054▾
- Median Home Value
- $114,700▴
- K-12 Enrollment
- 6,933▴
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.
Union 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.
Union County Population
Union County had 39,054 residents in 2020. That was 6.2% lower than in 2010. Union County had 6,575 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 38 people per square mile. Some of the county's most populated postal areas include El Dorado, Junction City and Smackover.
Population Trend in Union County AR
Union County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Union County Zip Codes
Union County has 8 zip codes. Some of the county's most populated zip codes include El Dorado (71730), Junction City (71749) and Smackover (71762). El Dorado is the largest zip by population, with about 31,103 residents or 80% of the county total. Together, the three largest zips account for about 92% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Union County AR
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 71730 | El Dorado | 31,103 | ▾ -3.4% |
| 71749 | Junction City | 2,368 | ▾ -8.7% |
| 71762 | Smackover | 2,288 | ▾ -8.5% |
| 71765 | Strong | 1,666 | ▾ -22.7% |
| 71747 | Huttig | 828 | ▾ -24.5% |
| Download all zip code data | |||
Union County Zip Code populations and trends per most recent census data.
Union County Demographics
Union County has a median age of 41.5, which makes the county a little older than Arkansas overall. About 24% 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 29.8% of the population, which points to a solid working-age base. About 18.9% of adults have a bachelor's degree or higher, above the statewide figure of 25.1%. 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 Union County AR
Median Age
41.5
Under 18
24%
Age 65+
18.9%
Bachelor's+
18.9%
Union County School Districts
Union County is served by 5 public school districts with 6,933 students enrolled in 2024. The largest districts on the county map are El Dorado, Smackover-Norphlet and Parkers Chapel. Those three districts account for about 86% 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 Union County AR
| District | Enrollment | Share | Trend |
|---|---|---|---|
| El Dorado School District | 3,921 | 56.6% | ▴ 1.1% |
| Smackover-Norphlet School District | 1,208 | 17.4% | ▴ 13% |
| Parkers Chapel School District | 847 | 12.2% | ▴ 8.9% |
| Junction City School District | 673 | 9.7% | ▾ -1.3% |
| Strong School District | 284 | 4.1% | ▾ -8.1% |
| Download all school district data | |||
Union County school district enrollment and trends per most recent NCES reporting data.
Union County Housing & Real Estate
Union County has a median home value of $114,700 and a median gross rent of $825. About 73% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Arkansas median, while rents come in below the state average. In March 2026, the median listing price was $217,500 and homes spent about 80 days on the market.
Union County Housing Mix
Union County housing mix: owner, renter and vacant units.
Union County Housing Trends
Union County median home value and rent trend (last 5 years).
Businesses in Union County, AR
Union County has 1,911 business listings across 441 categories. The largest categories in Union County business listings are Churches & Religious Organizations (106, 5.5%), Baptist Church (65, 3.4%), and Gas Stations (43, 2.3%). The full Union County business listings dataset includes names, categories, addresses and contact details where available. Union County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Union County, AR
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 106 | 5.5% |
| Baptist Church | 65 | 3.4% |
| Gas Stations | 43 | 2.3% |
| Auto Repair | 29 | 1.5% |
| Beauty Salons | 27 | 1.4% |
| Convenience Stores | 26 | 1.4% |
| Insurance Agencies | 25 | 1.3% |
| Fast Food | 25 | 1.3% |
| Professional Services | 23 | 1.2% |
| Community & Nonprofits | 23 | 1.2% |
Union County Business Listings
| Business | Category | City |
|---|---|---|
| Magdalene House - El Dorado | Abuse And Addiction Treatment | El Dorado |
| "OMEGA" | Accommodation | El Dorado |
| Larry Holder Cpa | Accountant | El Dorado |
| Creative Concepts | Advertising Agency | El Dorado |
| Wood Farm | Agricultural Service | El Dorado |
| El Dorado Downtown Airport | Airport | El Dorado |
| Pro Med Ambulance | Ambulance And Ems Services | El Dorado |
| Applebee's Grill + Bar | American Restaurants | El Dorado |
| Barkingham Acres Kennel | Animal Shelters | El Dorado |
| Annteekeys Antiques, Flea Mall, and Auctions | Antique Store | Strong |
| Download Union County business listings | ||
Union County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Union County Basemaps
Union 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 Union County Data Package
This page shows a preview of what's included in the Union 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 Union County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.