Oregon
Buying Land in Gilliam County, Oregon
Gilliam County is Oregon's least-populous county, a dryland wheat landscape along the Columbia River plateau near Condon and Arlington. Two non-agricultural industries -- utility-scale wind energy and a major regional landfill -- now generate outsized county revenue relative to the population, reshaping both the local tax base and what a rural landowner might do with acreage here.
A wheat-and-wind county with very few people
Gilliam County is Oregon's smallest county by population -- an estimated 1,971 residents as of 2025 -- spread across roughly 1,223 square miles of Columbia Plateau wheat country between the John Day and Deschutes river canyons. Condon, the county seat, and Arlington, on the Columbia River, are the only incorporated cities; nearly everything else is unincorporated, EFU-zoned farmland historically built around dryland wheat and cattle grazing. For a land buyer, this means the same statewide EFU dwelling-eligibility tests that apply across rural Oregon govern most parcels here -- confirm farm-income history, lot-of-record status, or another qualifying exception with Gilliam County Planning before assuming a new home is buildable on any specific tract.
Wind energy reshaped the county economy
What makes Gilliam genuinely distinctive among small Oregon counties is how thoroughly wind energy has reshaped its finances. The Shepherds Flat Wind Farm near Arlington -- at 845 megawatts, one of the largest wind farms in the world when construction began in 2009 -- along with the Leaning Juniper wind projects, generate substantial property tax revenue relative to the county's tiny population: wind projects alone contributed an estimated $11.9 million in county property taxes in 2020. That revenue helped move Gilliam from near the bottom of Oregon's 36 counties in per-capita income two decades ago to among the highest today. A dedicated page below covers the Strategic Investment Program mechanics behind these projects and what a private landowner considering leasing acreage for a turbine should understand.
The Columbia Ridge Landfill's outsized local role
Near Arlington, Waste Management's Columbia Ridge Landfill is another major driver of county revenue relative to Gilliam's size, accepting municipal solid waste hauled by rail and truck from across Oregon and beyond, and supporting roughly 140 family-wage jobs plus millions of dollars in annual host fees paid to the county. The facility also captures landfill gas to generate about 12.8 megawatts of renewable electricity. For a land buyer, the practical relevance is proximity: parcels near the landfill site or along its truck-and-rail access routes should be evaluated with that industrial neighbor specifically in mind, including any county-required buffer distance, before assuming a purely agricultural or residential rural setting.
Tax-base context: Strategic Investment Program abatements
Both the wind industry and other large capital projects in Gilliam County have made use of Oregon's Strategic Investment Program (SIP), which allows certain large 'traded sector' projects to negotiate a partial, capped property-tax arrangement instead of paying full assessed-value tax -- typically the first $25 million of project value goes on the tax rolls (rising 3% annually over the agreement term), with the company also paying an annual community service fee capped at $2.5 million. In March 2025, the Gilliam County Court approved a new SIP agreement with Avangrid for a $170-190 million repower of the Leaning Juniper IIB wind facility, extending the project's productive life and its associated county payments. Understanding that a meaningful share of the county's large-project tax base runs through these negotiated agreements, rather than standard assessment, is useful context for anyone comparing Gilliam's public-service funding to a neighboring county's.
Who to Call Before Buying Land in Gilliam County
Gilliam County is small enough that several county functions, including septic/onsite wastewater review, are handled through shared regional arrangements rather than a dedicated county department -- confirm current routing with the Planning Department.
Planning & Zoning
Gilliam County Planning Department
Confirming a parcel's EFU zoning, dwelling eligibility, and any wind-energy or landfill-related overlay or buffer requirement.
GIS / Parcel Records
Gilliam County Assessor
Parcel lookups and assessed value, including for property affected by Strategic Investment Program abatements.
Recorder / Clerk / Land Records
Gilliam County Clerk
Recorded deed, easement, and plat history for a specific parcel.
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Get local guidanceTopics Specific to Gilliam County
Sources
- Gilliam County, Oregon — Wikipedia (accessed 2026-09)
- Cash for trash: Columbia Ridge Landfill benefits Gilliam County — Capital Press (accessed 2026-09)
- Columbia Ridge Landfill Fact Sheet — Waste Management Northwest (accessed 2026-09)
- Wind energy keeps turning in rural Oregon — The Other Oregon (accessed 2026-09)
- Gilliam County approves Strategic Investment Program deal for Leaning Juniper repower — Citizen Portal (accessed 2026-09)
- ORS 307.123 -- Property of strategic investment program eligible projects; rules — Oregon Revised Statutes (accessed 2026-09)
- Implications of the Renewable Energy Transition for Oregon Counties — Association of Oregon Counties (accessed 2026-09)
- U.S. Census Bureau QuickFacts: Gilliam County, Oregon — U.S. Census Bureau (accessed 2026-09)
Last reviewed 2026-09