Knox County GIS Maps
Knox County, Ohio, has 62,721 residents and covers 525.5 square miles. The population grew 3% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Knox County is 39083.
Mount Vernon is the county's largest population center. Knox County also includes 8 zip codes, 9 public school districts and 44 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.
Knox County Trends
- Population
- 62,721▴
- Median Home Value
- $218,300▴
- K-12 Enrollment
- 11,847▾
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.
Knox 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.
Knox County Population
Knox County had 62,721 residents in 2020. That was 3% higher than in 2010. Knox County added 8,221 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 119 people per square mile. Some of the county's most populated postal areas include Mount Vernon, Fredericktown and Howard.
Population Trend in Knox County OH
Knox County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Knox County Zip Codes
Knox County has 8 zip codes. Some of the county's most populated zip codes include Mount Vernon (43050), Fredericktown (43019) and Howard (43028). Mount Vernon is the largest zip by population, with about 29,594 residents or 47% of the county total. Together, the three largest zips account for about 75% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Knox County OH
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 43050 | Mount Vernon | 29,594 | ▴ 1.9% |
| 43019 | Fredericktown | 9,419 | ▴ 8.3% |
| 43028 | Howard | 7,781 | ▴ 3.2% |
| 43011 | Centerburg | 7,559 | ▴ 0.9% |
| 43022 | Gambier | 4,120 | ▾ -1% |
| Download all zip code data | |||
Knox County Zip Code populations and trends per most recent census data.
Knox County Demographics
Knox County has a median age of 39.4, which is close to the Ohio average. About 23% of residents are under 18, while 18.7% 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 27.7% of the population, which points to a solid working-age base. About 24.3% 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 Knox County OH
Median Age
39.4
Under 18
23%
Age 65+
18.7%
Bachelor's+
24.3%
Knox County School Districts
Knox County is served by 9 public school districts with 11,847 students enrolled in 2024. The largest districts on the county map are Mount Vernon City, Clear Fork Valley Local and North Fork Local. Those three districts account for about 53% 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 Knox County OH
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Mount Vernon City School District | 3,374 | 28.5% | ▾ -3.3% |
| Clear Fork Valley Local School District | 1,472 | 12.4% | ▾ -3.5% |
| North Fork Local School District | 1,454 | 12.3% | ▾ -1.8% |
| Northridge Local School District | 1,167 | 9.9% | ▾ -3% |
| Fredericktown Local School District | 1,106 | 9.3% | ▾ -4.2% |
| Download all school district data | |||
Knox County school district enrollment and trends per most recent NCES reporting data.
Knox County Housing & Real Estate
Knox County has a median home value of $218,300 and a median gross rent of $925. About 75% 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 below the state average. In March 2026, the median listing price was $349,475 and homes spent about 42 days on the market.
Knox County Housing Mix
Knox County housing mix: owner, renter and vacant units.
Knox County Housing Trends
Knox County median home value and rent trend (last 5 years).
Businesses in Knox County, OH
Knox County has 2,425 business listings across 499 categories. The largest categories in Knox County business listings are Churches & Religious Organizations (103, 4.2%), Auto Repair (47, 1.9%), and Real Estate Agents (45, 1.9%). The full Knox County business listings dataset includes names, categories, addresses and contact details where available. Knox County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Knox County, OH
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 103 | 4.2% |
| Auto Repair | 47 | 1.9% |
| Real Estate Agents | 45 | 1.9% |
| Farm | 44 | 1.8% |
| Community & Nonprofits | 40 | 1.6% |
| Gas Stations | 33 | 1.4% |
| Pizza Restaurants | 31 | 1.3% |
| Parks & Recreation | 30 | 1.2% |
| Contractors | 29 | 1.2% |
| Gyms & Fitness | 28 | 1.2% |
Knox County Business Listings
| Business | Category | City |
|---|---|---|
| The Freedom Center | Abuse And Addiction Treatment | Mt Vernon |
| Cougar Corner | Academic Bookstore | Mt Vernon |
| Mather Residence Hall | Accommodation | Gambier |
| Buckeye Bookkeeping Solutions | Accountant | Fredericktown |
| Mohaven Camp And Retreat Center | Active Life | Danville |
| McKinley Advertising | Advertising Agency | Howard |
| Central Ohio Farmers Co-op | Agricultural Cooperatives | Mt Vernon |
| Ag Info Tech | Agricultural Service | Fredericktown |
| Green Valley Ag LLC | Agriculture | Mt Vernon |
| Wynkoop Airport | Airport | Mt Vernon |
| Download Knox County business listings | ||
Knox County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Knox County Basemaps
Knox 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 Knox County Data Package
This page shows a preview of what's included in the Knox 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 Knox County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.