Warren County GIS Maps
Warren County, Ohio, has 242,337 residents and covers 401.3 square miles. The population grew 13.9% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Warren County is 39165.
Mason is the county's largest population center. Warren County also includes 12 zip codes, 15 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 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.
Warren County Trends
- Population
- 242,337▴
- Median Home Value
- $319,700▴
- K-12 Enrollment
- 62,345▾
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.
Warren 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.
Warren County Population
Warren County had 242,337 residents in 2020. That was 13.9% higher than in 2010. Warren County added 83,954 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 604 people per square mile. Some of the county's most populated postal areas include Mason, Lebanon and Franklin.
Population Trend in Warren County OH
Warren County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Warren County Zip Codes
Warren County has 12 zip codes. Some of the county's most populated zip codes include Mason (45040), Lebanon (45036) and Franklin (45005). Mason is the largest zip by population, with about 57,153 residents or 24% of the county total. Together, the three largest zips account for about 54% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Warren County OH
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 45040 | Mason | 57,153 | ▴ 12.9% |
| 45036 | Lebanon | 41,060 | ▴ 9.5% |
| 45005 | Franklin | 31,577 | ▴ 5.4% |
| 45039 | Maineville | 27,529 | ▴ 20.7% |
| 45066 | Springboro | 26,399 | ▴ 10.7% |
| Download all zip code data | |||
Warren County Zip Code populations and trends per most recent census data.
Warren County Demographics
Warren County has a median age of 39.8, which is close to the Ohio average. About 24% of residents are under 18, while 15.3% 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 32.3% of the population, which points to a solid working-age base. About 45.7% of adults have a bachelor's degree or higher, above the statewide figure of 30.9%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Warren County OH
Median Age
39.8
Under 18
24%
Age 65+
15.3%
Bachelor's+
45.7%
Warren County School Districts
Warren County is served by 15 public school districts with 62,345 students enrolled in 2024. The largest districts on the county map are Mason City, Springboro Community City and Middletown City. Those three districts account for about 36% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Warren County OH
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Mason City School District | 10,155 | 16.3% | ▾ -1.3% |
| Springboro Community City School District | 6,194 | 9.9% | ▾ -1.1% |
| Middletown City School District | 5,946 | 9.5% | ▾ -0.5% |
| Princeton City School District | 5,927 | 9.5% | ▾ -0.2% |
| Little Miami Local School District | 5,672 | 9.1% | ▴ 2.8% |
| Download all school district data | |||
Warren County school district enrollment and trends per most recent NCES reporting data.
Warren County Housing & Real Estate
Warren County has a median home value of $319,700 and a median gross rent of $1,293. About 80% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Ohio median, while rents come in above the state average. In March 2026, the median listing price was $462,000 and homes spent about 55 days on the market.
Warren County Housing Mix
Warren County housing mix: owner, renter and vacant units.
Warren County Housing Trends
Warren County median home value and rent trend (last 5 years).
Businesses in Warren County, OH
Warren County has 8,496 business listings across 804 categories. The largest categories in Warren County business listings are Churches & Religious Organizations (195, 2.3%), Real Estate Agents (170, 2.0%), and Contractors (130, 1.5%). The full Warren County business listings dataset includes names, categories, addresses and contact details where available. Warren County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Warren County, OH
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 195 | 2.3% |
| Real Estate Agents | 170 | 2.0% |
| Contractors | 130 | 1.5% |
| Medical Offices | 119 | 1.4% |
| Insurance Agencies | 111 | 1.3% |
| Professional Services | 96 | 1.1% |
| Gas Stations | 93 | 1.1% |
| Parks & Recreation | 92 | 1.1% |
| Auto Repair | 90 | 1.1% |
| Beauty Salons | 90 | 1.1% |
Warren County Business Listings
| Business | Category | City |
|---|---|---|
| BrightView | Abuse And Addiction Treatment | Mason |
| Meadow View Apartments and Townhomes | Accommodation | Springboro |
| Hurst Kelly and Company | Accountant | Loveland |
| The Yard Sports Development | Active Life | Franklin |
| Balanced Wellbeing Acupuncture | Acupuncture | Waynesville |
| Cedar Oaks Wellness Center | Addiction Rehabilitation Center | Oregonia |
| Dealer Authority | Advertising Agency | Waynesville |
| Martin Marietta - Franklin Gravel | Aggregate Supplier | Franklin |
| LG Show Pigs | Agricultural Service | Lebanon |
| Village of Maineville Farmers Market | Agriculture | Maineville |
| Download Warren County business listings | ||
Warren County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Warren County Basemaps
Warren 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 Warren County Data Package
This page shows a preview of what's included in the Warren 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 Warren County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.