Gilliam County, OR

What LandBenchmark can tell you about a parcel in Gilliam County — and, just as importantly, what it can't.

Land area
1,204.7
sq mi
Water area
18.1
sq mi
County FIPS
41021
Center
45.383, -120.276

Area and center from the US Census Bureau 2023 Gazetteer.

Measured terrain around the Gilliam County centroid

Centroid elevation
601
m (1,972 ft)
Terrain relief
495
m spread (p95−p5, ~20–40 km window)

The county center sits at about 601 m above sea level. Elevation across the sampled window spreads 495 m — mountainous terrain by our banding (flat <30 m · gently rolling 30–100 m · hilly 100–300 m · mountainous >300 m). These are county-scale context, not parcel measurements — a specific parcel gets its own slope, flood and usable-acreage readings when analyzed.

Elevation measured 2026-07-21 from the AWS Terrain Tiles (terrarium encoding, z10).

Data available for Gilliam County

  • No free owner records. Oregon does not publish a free statewide parcel-and-owner dataset, so LandBenchmark cannot show who owns a parcel in Gilliam County. The county assessor's office is the authoritative source. Every measured signal below is unaffected.
  • Legal description — township, range and section from the BLM Public Land Survey System.
  • FEMA flood zones, wetlands, soil survey and NCCPI soil productivity — the federal layers, all free and all available here.
  • 56 measured signals from satellite imagery and public records — slope and usable acreage, observed surface water, vegetation trend, wildfire and seismic hazard, access and neighboring land use. Each one cites its method, its source, and the date it was observed.

LandBenchmark has no listings and does not know what is for sale in Gilliam County. It analyses a parcel you point it at. It is an automated Phase-1 desk screen, not a survey, a flood determination, or a substitute for on-site inspection.

Common questions about land in Gilliam County

Can I see who owns a parcel in Gilliam County?

Not from free data — Oregon does not publish a free statewide parcel-ownership dataset, and LandBenchmark does not buy broker data. The Gilliam County assessor's office is the authoritative source; every measured signal is unaffected.

How hilly is Gilliam County?

Around the county center, measured elevation spreads 495 m across a ~20–40 km window — mountainous terrain by our banding. Individual parcels vary: a report measures the actual slope and usable acreage of the parcel you point it at.

What can LandBenchmark measure for a parcel in Gilliam County?

56 measured signals, each cited with source and observation date: FEMA flood zone plus surface water observed in multi-year imagery, USFWS wetlands, USDA soil survey and productivity, slope and usable acreage, wildfire and seismic hazard, access and surroundings. What a satellite cannot verify — title, zoning, perc results, water rights — goes on a human-verify checklist naming the Gilliam County offices that can.

Nearest neighboring counties