Hamilton County GIS Maps
Hamilton County, Ohio, has 830,639 residents and covers 406 square miles. The population grew 3.5% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Hamilton County is 39061.
Cincinnati is the county's largest population center. Hamilton County also includes 54 zip codes, 25 public school districts and 66 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.
Hamilton County Trends
- Population
- 830,639▴
- Median Home Value
- $225,700▴
- K-12 Enrollment
- 102,791▾
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.
Hamilton 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.
Hamilton County Population
Hamilton County had 830,639 residents in 2020. That was 3.5% higher than in 2010. Hamilton County had 14,664 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 2,046 people per square mile. Some of the county's most populated postal areas include Cincinnati, Cincinnati and Cincinnati.
Population Trend in Hamilton County OH
Hamilton County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Hamilton County Zip Codes
Hamilton County has 54 zip codes. Some of the county's most populated zip codes include Cincinnati (45238), Cincinnati (45231) and Cincinnati (45211). Cincinnati is the largest zip by population, with about 46,864 residents or 6% of the county total. Together, the three largest zips account for about 15% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Hamilton County OH
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 45238 | Cincinnati | 46,864 | ▴ 2.4% |
| 45231 | Cincinnati | 41,934 | ▴ 2.5% |
| 45211 | Cincinnati | 37,868 | ▴ 4.9% |
| 45215 | Cincinnati | 30,993 | ▴ 4.6% |
| 45244 | Cincinnati | 28,936 | ▴ 1.3% |
| Download all zip code data | |||
Hamilton County Zip Code populations and trends per most recent census data.
Hamilton County Demographics
Hamilton County has a median age of 36.9, which makes the county a little younger than Ohio overall. About 23.1% of residents are under 18, while 16.2% 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 33% of the population, which points to a solid working-age base. About 41.4% 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 Hamilton County OH
Median Age
36.9
Under 18
23.1%
Age 65+
16.2%
Bachelor's+
41.4%
Hamilton County School Districts
Hamilton County is served by 25 public school districts with 102,791 students enrolled in 2024. The largest districts on the county map are Cincinnati City, Northwest Local and Oak Hills Local. Those three districts account for about 48% 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 Hamilton County OH
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Cincinnati City School District | 33,797 | 32.9% | ▾ -3% |
| Northwest Local School District | 8,260 | 8% | ▾ -2.4% |
| Oak Hills Local School District | 7,381 | 7.2% | ▾ -1.4% |
| Forest Hills Local School District | 6,827 | 6.6% | ▾ -1.6% |
| Sycamore Community City School District | 6,051 | 5.9% | ▴ 1.9% |
| Download all school district data | |||
Hamilton County school district enrollment and trends per most recent NCES reporting data.
Hamilton County Housing & Real Estate
Hamilton County has a median home value of $225,700 and a median gross rent of $1,005. About 59% 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 $302,475 and homes spent about 41 days on the market.
Hamilton County Housing Mix
Hamilton County housing mix: owner, renter and vacant units.
Hamilton County Housing Trends
Hamilton County median home value and rent trend (last 5 years).
Businesses in Hamilton County, OH
Hamilton County has 36,293 business listings across 1,184 categories. The largest categories in Hamilton County business listings are Churches & Religious Organizations (781, 2.2%), Real Estate Agents (562, 1.5%), and Community & Nonprofits (552, 1.5%). The full Hamilton County business listings dataset includes names, categories, addresses and contact details where available. Hamilton County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Hamilton County, OH
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 781 | 2.2% |
| Real Estate Agents | 562 | 1.5% |
| Community & Nonprofits | 552 | 1.5% |
| Landmark And Historical Building | 529 | 1.5% |
| Beauty Salons | 501 | 1.4% |
| Professional Services | 501 | 1.4% |
| Contractors | 494 | 1.4% |
| Parks & Recreation | 454 | 1.3% |
| Banks & Credit Unions | 436 | 1.2% |
| ATMs | 413 | 1.1% |
Hamilton County Business Listings
| Business | Category | City |
|---|---|---|
| Glendale Place Nursing and Rehabilitation Center | Abuse And Addiction Treatment | Cincinnati |
| University of Cincinnati Bookstore | Academic Bookstore | Cincinnati |
| 49 Hundred | Accommodation | Blue Ash |
| Bookaholic Bookkeeping | Accountant | Cincinnati |
| House of Run and Tri | Active Life | Cincinnati |
| Cincinnati Acupuncture Clinic | Acupuncture | Cincinnati |
| Cincinnati Suboxone Clinic | Addiction Rehabilitation Center | Cincinnati |
| American Adoptions | Adoption Services | Cincinnati |
| STNA Classes in Cincinnati | Adult Education | Cincinnati |
| Hustler Hollywood | Adult Entertainment | Cincinnati |
| Download Hamilton County business listings | ||
Hamilton County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Hamilton County Basemaps
Hamilton 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 Hamilton County Data Package
This page shows a preview of what's included in the Hamilton 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 Hamilton County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.