Jay County GIS Maps
Jay County, Indiana, has 20,478 residents across 14,131 parcels and covers 383.9 square miles. The population declined 3.6% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Jay County is 18075.
Portland is the county's largest population center. Jay County also includes 6 zip codes, 1 public school district and 25 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 parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Jay County Trends
- Population
- 20,478▾
- Median Home Value
- $110,100▴
- K-12 Enrollment
- 2,950▾
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.
Jay 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.
Jay County Parcels
Jay County has 14,131 mapped parcels covering 216,090 acres. The median assessed value is $76,500. The median lot size is 1.79 acres. 4,141 parcels are 10 acres or larger. The records carry 9,013 distinct owner names. Owner names, site addresses and assessed values are on nearly every parcel. Lot sizes reach 94.6%. Browse the interactive Jay County Parcel viewer here.
Jay County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 14,130 | 100% |
| Owner name | 14,091 | 99.7% |
| Owner mailing address | 0 | 0% |
| Site address | 14,091 | 99.7% |
| Land use code | 0 | 0% |
| Land use description | 0 | 0% |
| Assessed value | 14,073 | 99.6% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 13,366 | 94.6% |
| Parcel boundary | 14,130 | 100% |
| Download all Jay County parcels. | ||
Field coverage measured across all Jay County parcel records.
Jay County Population
Jay County had 20,478 residents in 2020. That was 3.6% lower than in 2010. Jay County had 1,328 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 53 people per square mile. Some of the county's most populated postal areas include Portland, Dunkirk and Bryant.
Population Trend in Jay County IN
Jay County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Jay County Zip Codes
Jay County has 6 zip codes. Some of the county's most populated zip codes include Portland (47371), Dunkirk (47336) and Bryant (47326). Portland is the largest zip by population, with about 12,143 residents or 59% of the county total. Together, the three largest zips account for about 88% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Jay County IN
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 47371 | Portland | 12,143 | ▾ -0.7% |
| 47336 | Dunkirk | 3,455 | ▾ -9.2% |
| 47326 | Bryant | 2,321 | ▴ 1.1% |
| 47373 | Redkey | 2,015 | ▾ -9.5% |
| 47369 | Pennville | 1,216 | ▾ -9.5% |
| Download all zip code data | |||
Jay County Zip Code populations and trends per most recent census data.
Jay County Demographics
Jay County has a median age of 39.6, which makes the county a little older than Indiana overall. About 25.7% of residents are under 18, while 18.1% 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 28.4% of the population, which points to a solid working-age base. About 12.7% of adults have a bachelor's degree or higher, above the statewide figure of 28.8%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Jay County IN
Median Age
39.6
Under 18
25.7%
Age 65+
18.1%
Bachelor's+
12.7%
Jay County School Districts
Jay County is served by 1 public school district with 2,950 students enrolled in 2024. Several larger districts account for a substantial share of students across the county map area. Those three districts account for about 100% 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 Jay County IN
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Jay School Corporation | 2,950 | 100% | ▾ -1.2% |
| Download all school district data | |||
Jay County school district enrollment and trends per most recent NCES reporting data.
Jay County Housing & Real Estate
Jay County has a median home value of $110,100 and a median gross rent of $766. About 78% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Indiana median, while rents come in below the state average. In March 2026, the median listing price was $139,450 and homes spent about 54 days on the market.
Jay County Housing Mix
Jay County housing mix: owner, renter and vacant units.
Jay County Housing Trends
Jay County median home value and rent trend (last 5 years).
Businesses in Jay County, IN
Jay County has 783 business listings across 289 categories. The largest categories in Jay County business listings are Churches & Religious Organizations (43, 5.5%), Auto Repair (18, 2.3%), and Community & Nonprofits (17, 2.2%). The full Jay County business listings dataset includes names, categories, addresses and contact details where available. Jay County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Jay County, IN
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 43 | 5.5% |
| Auto Repair | 18 | 2.3% |
| Community & Nonprofits | 17 | 2.2% |
| Landmark And Historical Building | 15 | 1.9% |
| Gas Stations | 13 | 1.7% |
| Insurance Agencies | 13 | 1.7% |
| Public And Government Association | 11 | 1.4% |
| Convenience Stores | 10 | 1.3% |
| Funeral Services & Cemeteries | 10 | 1.3% |
| Parks & Recreation | 10 | 1.3% |
Jay County Business Listings
| Business | Category | City |
|---|---|---|
| Hickory Grove Lakes | Accommodation | Portland |
| Bollenbacher and Associates | Accountant | Portland |
| AgBest Cooperative | Agricultural Cooperatives | Dunkirk |
| USDA Agricultural Service Center | Agricultural Service | Portland |
| Bsf AG Research Inc | Agriculture | Portland |
| Portland Municipal Airport | Airport | Portland |
| Jay County EMS | Ambulance And Ems Services | Portland |
| Richards Restaurant, Portland, Indiana | American Restaurants | Portland |
| Cat Tales | Animal Shelters | Portland |
| Wheel & Spoke Antique Mall | Antique Store | Portland |
| Download Jay County business listings | ||
Jay County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Jay County Basemaps
Jay 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 Jay County Data Package
This page shows a preview of what's included in the Jay 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 parcels, 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 Jay County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.