Grant County GIS Maps
Grant County, Oregon, has 7,233 residents and covers 4,527.8 square miles. The population declined 2.8% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Grant County is 41023.
John Day is the county's largest population center. Grant County also includes 11 zip codes, 5 public school districts and 14 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.
Grant County Trends
- Population
- 7,233▾
- Median Home Value
- $225,100▴
- K-12 Enrollment
- 1,805▾
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.
Grant 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.
Grant County Population
Grant County had 7,233 residents in 2020. That was 2.8% lower than in 2010. Grant County had 702 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 people per square mile. Some of the county's most populated postal areas include John Day, Mount Vernon and Prairie City.
Population Trend in Grant County OR
Grant County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Grant County Zip Codes
Grant County has 11 zip codes. Some of the county's most populated zip codes include John Day (97845), Mount Vernon (97865) and Prairie City (97869). John Day is the largest zip by population, with about 2,653 residents or 37% of the county total. Together, the three largest zips account for about 66% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Grant County OR
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 97845 | John Day | 2,653 | ▴ 0% |
| 97865 | Mount Vernon | 1,092 | ▾ -5.9% |
| 97869 | Prairie City | 1,028 | ▾ -9.4% |
| 97820 | Canyon City | 1,020 | ▾ -6.8% |
| 97856 | Long Creek | 409 | ▴ 11.7% |
| Download all zip code data | |||
Grant County Zip Code populations and trends per most recent census data.
Grant County Demographics
Grant County has a median age of 50.8, which makes the county a little older than Oregon overall. About 17.1% of residents are under 18, while 31.6% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 65 and over at about 31.6% of the population, which points to an older population profile. About 19.7% of adults have a bachelor's degree or higher, above the statewide figure of 36.2%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Grant County OR
Median Age
50.8
Under 18
17.1%
Age 65+
31.6%
Bachelor's+
19.7%
Grant County School Districts
Grant County is served by 5 public school districts with 1,805 students enrolled in 2024. The largest districts on the county map are Prairie City 4, John Day 3 and Monument 8. Those three districts account for about 96% of public school enrollment in the map area. Total enrollment has grown modestly since 2017 across the districts shown on the county map.
Largest School Districts by Enrollment in Grant County OR
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Prairie City School District 4 | 1,211 | 67.1% | ▾ -1.1% |
| John Day School District 3 | 465 | 25.8% | ▾ -1.3% |
| Monument School District 8 | 53 | 2.9% | ▾ -1.9% |
| Dayville School District 16J | 48 | 2.7% | ▴ 4.3% |
| Long Creek School District 17 | 28 | 1.6% | ▴ 47.4% |
| Download all school district data | |||
Grant County school district enrollment and trends per most recent NCES reporting data.
Grant County Housing & Real Estate
Grant County has a median home value of $225,100 and a median gross rent of $840. About 81% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Oregon median, while rents come in below the state average. In March 2026, the median listing price was $375,000 and homes spent about 134 days on the market.
Grant County Housing Mix
Grant County housing mix: owner, renter and vacant units.
Grant County Housing Trends
Grant County median home value and rent trend (last 5 years).
Businesses in Grant County, OR
Grant County has 516 business listings across 192 categories. The largest categories in Grant County business listings are Structure And Geography (47, 9.1%), Mountain (24, 4.7%), and Churches & Religious Organizations (13, 2.5%). The full Grant County business listings dataset includes names, categories, addresses and contact details where available. Grant County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Grant County, OR
| Category | Businesses | Share |
|---|---|---|
| Structure And Geography | 47 | 9.1% |
| Mountain | 24 | 4.7% |
| Churches & Religious Organizations | 13 | 2.5% |
| Lake | 11 | 2.1% |
| Public And Government Association | 11 | 2.1% |
| Post Offices | 10 | 1.9% |
| Hotels | 10 | 1.9% |
| Gas Stations | 10 | 1.9% |
| River | 9 | 1.7% |
| Landmark And Historical Building | 9 | 1.7% |
Grant County Business Listings
| Business | Category | City |
|---|---|---|
| Double T Guest Ranch | Accommodation | Kimberly |
| Solutions CPAs | Accountant | John Day |
| Gibco Ag & Industrial | Agriculture | Canyon City |
| Grant County Regional Airport | Airport | John Day |
| Outpost Pizza Pub & Grill | American Restaurants | John Day |
| Prairie City Antiques and Fine Jewelry | Antique Store | Prairie City |
| Great Basin Art | Art Gallery | Prairie City |
| Blue Mountain Care Center | Assisted Living Facility | Prairie City |
| LibertyX Bitcoin ATM | ATMs | John Day |
| John Day Community Garden | Attractions And Activities | John Day |
| Download Grant County business listings | ||
Grant County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Grant County Basemaps
Grant 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 Grant County Data Package
This page shows a preview of what's included in the Grant 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 Grant County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.