Putnam County GIS Maps
Putnam County, Ohio, has 34,451 residents and covers 482.5 square miles. The population declined 0.1% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Putnam County is 39137.
Ottawa is the county's largest population center. Putnam County also includes 13 zip codes, 11 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.
Putnam County Trends
- Population
- 34,451▾
- Median Home Value
- $191,600▴
- K-12 Enrollment
- 7,709▾
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.
Putnam 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.
Putnam County Population
Putnam County had 34,451 residents in 2020. That was 0.1% lower than in 2010. Putnam County had 275 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 71 people per square mile. Some of the county's most populated postal areas include Ottawa, Columbus Grove and Leipsic.
Population Trend in Putnam County OH
Putnam County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Putnam County Zip Codes
Putnam County has 13 zip codes. Some of the county's most populated zip codes include Ottawa (45875), Columbus Grove (45830) and Leipsic (45856). Ottawa is the largest zip by population, with about 11,273 residents or 33% of the county total. Together, the three largest zips account for about 64% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Putnam County OH
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 45875 | Ottawa | 11,273 | ▴ 2.6% |
| 45830 | Columbus Grove | 5,797 | ▾ -6.9% |
| 45856 | Leipsic | 5,094 | ▾ -1.9% |
| 45844 | Fort Jennings | 3,251 | ▾ -0.2% |
| 45831 | Continental | 3,023 | ▾ -5% |
| Download all zip code data | |||
Putnam County Zip Code populations and trends per most recent census data.
Putnam County Demographics
Putnam County has a median age of 40, which is close to the Ohio average. About 25.4% 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 28.3% of the population, which points to a solid working-age base. About 26.3% 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 Putnam County OH
Median Age
40
Under 18
25.4%
Age 65+
18.3%
Bachelor's+
26.3%
Putnam County School Districts
Putnam County is served by 11 public school districts with 7,709 students enrolled in 2024. The largest districts on the county map are Ottawa-Glandorf Local, Patrick Henry Local and Wayne Trace Local. Those three districts account for about 42% 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 Putnam County OH
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Ottawa-Glandorf Local School District | 1,500 | 19.5% | ▴ 0.1% |
| Patrick Henry Local School District | 887 | 11.5% | ▴ 3.5% |
| Wayne Trace Local School District | 884 | 11.5% | ▾ -1.4% |
| Columbus Grove Local School District | 726 | 9.4% | ▾ -3.8% |
| Leipsic Local School District | 686 | 8.9% | ▴ 3.9% |
| Download all school district data | |||
Putnam County school district enrollment and trends per most recent NCES reporting data.
Putnam County Housing & Real Estate
Putnam County has a median home value of $191,600 and a median gross rent of $857. About 86% 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 $189,900 and homes spent about 56 days on the market.
Putnam County Housing Mix
Putnam County housing mix: owner, renter and vacant units.
Putnam County Housing Trends
Putnam County median home value and rent trend (last 5 years).
Businesses in Putnam County, OH
Putnam County has 1,232 business listings across 355 categories. The largest categories in Putnam County business listings are Churches & Religious Organizations (34, 2.8%), Contractors (29, 2.4%), and Insurance Agencies (26, 2.1%). The full Putnam County business listings dataset includes names, categories, addresses and contact details where available. Putnam County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Putnam County, OH
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 34 | 2.8% |
| Contractors | 29 | 2.4% |
| Insurance Agencies | 26 | 2.1% |
| Hair Salons | 22 | 1.8% |
| Auto Repair | 22 | 1.8% |
| Pizza Restaurants | 19 | 1.5% |
| Gas Stations | 19 | 1.5% |
| Public And Government Association | 18 | 1.5% |
| Hardware Stores | 16 | 1.3% |
| Post Offices | 16 | 1.3% |
Putnam County Business Listings
| Business | Category | City |
|---|---|---|
| Walther Estates | Accommodation | Leipsic |
| Verhoff & Company | Accountant | Ottawa |
| Ottawa K Of C | Active Life | Ottawa |
| Ricker Showpigs | Advertising Agency | Fort Jennings |
| Wollam AG Center Inc | Aggregate Supplier | Continental |
| Helena Argi Enterprises | Agricultural Service | Continental |
| Verhoff Alfalfa Mills, Inc. | Agriculture | Ottawa |
| Putnam County Airport | Airport | Ottawa |
| Pandora's Lunch Box | American Restaurants | Pandora |
| Country K9 Kennels | Animal Shelters | Ottawa |
| Download Putnam County business listings | ||
Putnam County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Putnam County Basemaps
Putnam 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 Putnam County Data Package
This page shows a preview of what's included in the Putnam 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 Putnam County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.