Gilliam County GIS Maps
Gilliam County, Oregon, has 1,995 residents across 2,996 parcels and covers 1,204.7 square miles. The population grew 6.6% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Gilliam County is 41021.
Condon is the county's largest population center. Gilliam County also includes 2 zip codes, 3 public school districts and 11 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.
Gilliam County Trends
- Population
- 1,995▴
- Median Home Value
- $158,400▴
- K-12 Enrollment
- 374▾
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.
Gilliam 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.
Gilliam County Parcels
Gilliam County has 2,996 mapped parcels covering 776,823 acres. The median lot size is 8.36 acres. 1,480 parcels are 10 acres or larger. The records carry 1,224 distinct owner names. Owner names, site addresses and lot sizes are on nearly every parcel. Browse the interactive Gilliam County Parcel viewer here.
Gilliam County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 2,996 | 100% |
| Owner name | 2,965 | 99.0% |
| Owner mailing address | 0 | 0% |
| Site address | 2,959 | 98.8% |
| Land use code | 2,965 | 99.0% |
| Land use description | 0 | 0% |
| Assessed value | 0 | 0% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 2,992 | 99.9% |
| Parcel boundary | 2,996 | 100% |
| Download all Gilliam County parcels. | ||
Field coverage measured across all Gilliam County parcel records.
Gilliam County Population
Gilliam County had 1,995 residents in 2020. That was 6.6% higher than in 2010. Gilliam County added 80 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 2 people per square mile. Two of the county's most populated postal areas are Condon and Arlington.
Population Trend in Gilliam County OR
Gilliam County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Gilliam County Zip Codes
Gilliam County has 2 zip codes. Two of the county's most populated zip codes are Condon (97823) and Arlington (97812). Condon is the largest zip by population, with about 1,014 residents or 51% of the county total. Together, the three largest zips account for about 98% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Gilliam County OR
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 97823 | Condon | 1,014 | ▴ 7% |
| 97812 | Arlington | 940 | ▴ 10.5% |
| Download all zip code data | |||
Gilliam County Zip Code populations and trends per most recent census data.
Gilliam County Demographics
Gilliam County has a median age of 50.3, which makes the county a little older than Oregon overall. About 19% of residents are under 18, while 31.8% 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 31.8% of the population, which points to an older population profile. About 20.9% 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 Gilliam County OR
Median Age
50.3
Under 18
19%
Age 65+
31.8%
Bachelor's+
20.9%
Gilliam County School Districts
Gilliam County is served by 3 public school districts with 374 students enrolled in 2024. The largest districts on the county map are Condon 25J, Arlington 3 and Ione 2. 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 Gilliam County OR
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Condon School District 25J | 131 | 35% | ▾ -3.7% |
| Arlington School District 3 | 130 | 34.8% | ▾ -4.4% |
| Ione School District 2 | 113 | 30.2% | ▾ -11% |
| Download all school district data | |||
Gilliam County school district enrollment and trends per most recent NCES reporting data.
Gilliam County Housing & Real Estate
Gilliam County has a median home value of $158,400 and a median gross rent of $1,084. About 76% 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 $350,000 and homes spent about 28 days on the market.
Gilliam County Housing Mix
Gilliam County housing mix: owner, renter and vacant units.
Gilliam County Housing Trends
Gilliam County median home value and rent trend (last 5 years).
Businesses in Gilliam County, OR
Gilliam County has 147 business listings across 78 categories. The largest categories in Gilliam County business listings are Structure And Geography (20, 13.6%), River (6, 4.1%), and Elementary School (5, 3.4%). The full Gilliam County business listings dataset includes names, categories, addresses and contact details where available. Gilliam County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Gilliam County, OR
| Category | Businesses | Share |
|---|---|---|
| Structure And Geography | 20 | 13.6% |
| River | 6 | 4.1% |
| Elementary School | 5 | 3.4% |
| Landmark And Historical Building | 4 | 2.7% |
| Auto Repair | 4 | 2.7% |
| Hotels | 4 | 2.7% |
| American Restaurants | 4 | 2.7% |
| Parks & Recreation | 3 | 2.0% |
| Community & Nonprofits | 3 | 2.0% |
| Churches & Religious Organizations | 3 | 2.0% |
Gilliam County Business Listings
| Business | Category | City |
|---|---|---|
| Open Country Farm & Feed | Agriculture | Condon |
| Condon State Airport | Airport | Condon |
| North Gilliam Medic Ambulance | Ambulance And Ems Services | Arlington |
| Happy Canyon Pizza And Chicken | American Restaurants | Arlington |
| Opal Butte Outfitters | Archery Range | Heppner |
| The Rubber Buggy | Arts And Crafts | Condon |
| Maplewood Moseley Garden | Attractions And Activities | Vancouver |
| T&S Auto Service | Auto Repair | Arlington |
| NAPA Auto Parts | Auto Parts And Supply Store | Condon |
| WM - Chemical Waste Management of the Northwest | B2B Cleaning And Waste Management | Arlington |
| Download Gilliam County business listings | ||
Gilliam County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Gilliam County Basemaps
Gilliam 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 Gilliam County Data Package
This page shows a preview of what's included in the Gilliam 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 Gilliam County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.