Montgomery County GIS Maps
Montgomery County, Ohio, has 537,309 residents and covers 461.5 square miles. The population grew 0.4% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Montgomery County is 39113.
Dayton is the county's largest population center. Montgomery County also includes 32 zip codes, 21 public school districts and 43 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.
Montgomery County Trends
- Population
- 537,309▴
- Median Home Value
- $167,400▴
- K-12 Enrollment
- 79,731▾
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.
Montgomery 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.
Montgomery County Population
Montgomery County had 537,309 residents in 2020. That was 0.4% higher than in 2010. Montgomery County had 21,753 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 1,164 people per square mile. Some of the county's most populated postal areas include Dayton, Miamisburg and Dayton.
Population Trend in Montgomery County OH
Montgomery County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Montgomery County Zip Codes
Montgomery County has 32 zip codes. Some of the county's most populated zip codes include Dayton (45424), Miamisburg (45342) and Dayton (45458). Dayton is the largest zip by population, with about 50,920 residents or 9% of the county total. Together, the three largest zips account for about 23% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Montgomery County OH
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 45424 | Dayton | 50,920 | ▴ 2% |
| 45342 | Miamisburg | 37,508 | ▴ 2% |
| 45458 | Dayton | 36,474 | ▴ 22.1% |
| 45459 | Dayton | 28,344 | ▴ 2.1% |
| 45417 | Dayton | 28,079 | ▾ -10.2% |
| Download all zip code data | |||
Montgomery County Zip Code populations and trends per most recent census data.
Montgomery County Demographics
Montgomery County has a median age of 38.8, which makes the county a little younger than Ohio overall. About 22.2% of residents are under 18, while 18.3% 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 31.3% of the population, which points to a solid working-age base. About 30.5% of adults have a bachelor's degree or higher, above the statewide figure of 30.9%. 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 Montgomery County OH
Median Age
38.8
Under 18
22.2%
Age 65+
18.3%
Bachelor's+
30.5%
Montgomery County School Districts
Montgomery County is served by 21 public school districts with 79,731 students enrolled in 2024. The largest districts on the county map are Dayton City, Centerville City and Beavercreek 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, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Montgomery County OH
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Dayton City School District | 12,118 | 15.2% | ▾ -1.4% |
| Centerville City School District | 8,250 | 10.3% | ▾ -1.9% |
| Beavercreek City School District | 8,099 | 10.2% | ▴ 1.1% |
| Kettering City School District | 7,635 | 9.6% | ▾ -1.6% |
| Huber Heights City School District | 5,815 | 7.3% | ▾ -1.5% |
| Download all school district data | |||
Montgomery County school district enrollment and trends per most recent NCES reporting data.
Montgomery County Housing & Real Estate
Montgomery County has a median home value of $167,400 and a median gross rent of $968. About 62% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Ohio median, while rents come in below the state average. In March 2026, the median listing price was $213,450 and homes spent about 46 days on the market.
Montgomery County Housing Mix
Montgomery County housing mix: owner, renter and vacant units.
Montgomery County Housing Trends
Montgomery County median home value and rent trend (last 5 years).
Businesses in Montgomery County, OH
Montgomery County has 21,571 business listings across 1,038 categories. The largest categories in Montgomery County business listings are Churches & Religious Organizations (633, 2.9%), Medical Offices (455, 2.1%), and Real Estate Agents (329, 1.5%). The full Montgomery County business listings dataset includes names, categories, addresses and contact details where available. Montgomery County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Montgomery County, OH
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 633 | 2.9% |
| Medical Offices | 455 | 2.1% |
| Real Estate Agents | 329 | 1.5% |
| Parks & Recreation | 303 | 1.4% |
| Auto Repair | 291 | 1.3% |
| Contractors | 280 | 1.3% |
| Beauty Salons | 271 | 1.3% |
| Landmark And Historical Building | 265 | 1.2% |
| ATMs | 258 | 1.2% |
| Community & Nonprofits | 245 | 1.1% |
Montgomery County Business Listings
| Business | Category | City |
|---|---|---|
| Clearly Charlotte Sublimation Experience | 3D Printing Service | Clayton |
| OneFifteen Outpatient Clinic | Abuse And Addiction Treatment | Dayton |
| University of Dayton Bookstore | Academic Bookstore | Dayton |
| Extended Stay America | Accommodation | Dayton |
| Skelley & Company CPAs | Accountant | Centerville |
| Stride Hockey Development | Active Life | Centerville |
| Far Hills Acupuncture | Acupuncture | Dayton |
| Addiction Treatment Dayton | Addiction Rehabilitation Center | Dayton |
| Club 101 | Adult Entertainment | Dayton |
| adultmart | Adult Store | Dayton |
| Download Montgomery County business listings | ||
Montgomery County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Montgomery County Basemaps
Montgomery 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 Montgomery County Data Package
This page shows a preview of what's included in the Montgomery 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 Montgomery County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.