The Greater Idaho movement is a rural Oregon campaign to redraw the Oregon-Idaho border so that roughly fifteen eastern Oregon counties, about 65 percent of Oregon’s landmass, become part of Idaho. It is constitutionally possible but politically improbable: thirteen eastern Oregon counties have passed advisory measures supporting the change, but the transfer still requires yes votes from the Oregon Legislature, the Idaho Legislature, and the U.S. Congress, and Oregon’s legislature has so far refused to engage.
What the Movement Is Asking For
The proposed line would run roughly along the Deschutes River. About fifteen eastern counties would leave Oregon and join Idaho, taking with them one of Oregon’s current congressional districts and most of its land area. The affected region is vast but sparsely populated, made up of rural communities and small towns. Idaho would more than double in geographic size while adding a relatively modest number of residents.
Much of the territory is federal land. The Bureau of Land Management and the U.S. Forest Service control large portions of eastern Oregon, so any transfer would also shift federal land management relationships, grazing permits, and resource allocation frameworks that Congress would have to address.
The effort coalesced around 2019 under Mike McCarter and grew during the pandemic into a county-by-county ballot campaign. Its core argument is cultural and political: eastern Oregon votes conservative and feels outvoted by the Willamette Valley cities that control Salem, and Idaho’s tax structure, regulatory approach, and political culture more closely match how the region already lives.
Is a Border Change Legally Possible?
Yes, the legal pathway exists. Article IV, Section 3 of the U.S. Constitution says no state can be formed by joining parts of existing states without the consent of both state legislatures involved and the approval of Congress.1Library of Congress. Article 4 Section 3 Clause 1 The clause is written about creating new states, but it has been read to reach significant border adjustments between existing states because the same constitutional interests are at stake.
Oregon’s own constitution provides the state-side mechanism. Article XVI addresses boundaries and permits modification through an interstate compact approved by Congress.2Oregon State Legislature. Oregon Constitution – Article XVI Boundaries So the path on paper is straightforward: Oregon and Idaho negotiate a compact, both legislatures ratify it, and Congress signs off. The law doesn’t forbid it. The problem is getting every required body to say yes.
The West Virginia Precedent
The closest thing to precedent is the creation of West Virginia in 1863, when Virginia’s western counties broke away and Congress admitted them as a new state. Virginia later sued over its pre-war debt. The Supreme Court treated the dispute as a “quasi-international controversy” and apportioned the debt based on the relative property values of each state at separation.3U.S. Reports. Virginia v. West Virginia The takeaway for Greater Idaho: any transferred region has to take on a fair share of debt incurred for the benefit of the whole state. Smaller border tweaks have happened over the years, but nothing on this scale has been attempted between two existing states in peacetime.
Where Things Stand
Between 2020 and 2024, voters in thirteen eastern Oregon counties approved advisory measures backing the border move: Baker, Crook, Grant, Harney, Jefferson, Klamath, Lake, Malheur, Morrow, Sherman, Union, Wallowa, and Wheeler.4Ballotpedia. Greater Idaho, Oregon, Countywide Ballot Measures (2020-2024) The measures are non-binding, though several require county commissioners to hold regular public meetings on the topic.
In Idaho, the state House passed a nonbinding resolution in February 2023 calling for formal border talks with Oregon. Governor Brad Little has said he supports having those discussions. The Idaho Senate has not passed comparable action.
In Oregon, Senate Joint Memorial 2, introduced in 2023, would have requested that Oregon and Idaho begin discussions about relocating the border.5Oregon State Legislature. Senate Joint Memorial 2 It died in a Senate committee and was not revived in 2024. House Bill 3844, introduced in February 2025, proposed a state task force to study the legal and legislative steps a border change would require. It has not advanced.
Momentum is not one-directional. In Wallowa County, one of the thirteen that originally voted yes, a petition qualified for the May 2026 ballot that would rescind the requirement for commissioners to hold public meetings on the issue. Three other counties defeated similar reversal efforts. The movement’s own polling has acknowledged that Oregon voters statewide broadly oppose breaking up the state.
Why Oregon’s Legislature Is the Wall
Oregon’s legislature is controlled by Democrats who have shown no interest in approving a border change. Governor Tina Kotek has not responded to requests for talks from Greater Idaho leaders, and the legislature has declined to take up related bills in any meaningful way. Losing thirteen rural counties would further concentrate Democratic power in what remained of Oregon, which could look like an incentive to let them go, but the state would also be giving up roughly two-thirds of its land area, significant natural resources, and the political precedent of allowing secession-by-annexation. The structural reasons for Salem to say no don’t turn on a single election cycle.
Idaho’s Qualified Interest
Idaho’s enthusiasm is real but hedged. A Trafalgar Group poll found 53 percent of Idahoans thought their state should be prepared to negotiate annexation of eastern Oregon counties, leaving a sizable minority unconvinced. Eastern Oregon’s counties have generally been net recipients of state funding rather than net contributors, so Idaho would be absorbing territory that costs more in services than it generates in revenue. Road maintenance, education funding, law enforcement, and social services would all need to stretch across a dramatically larger area. The Idaho House resolution was nonbinding, and the Senate has not matched it.
What Congress Would Have to Sort Out
If both states somehow agreed, Congress would still have to pass legislation approving the compact. A shift this large raises questions neither party in Washington has much incentive to resolve: how to reapportion congressional seats, how to transfer federal land management, how to divide Oregon’s bonded debt, and how to handle pension obligations for state employees in the transferred counties. Virginia v. West Virginia establishes that debt must be apportioned equitably, but “equitably” in a case this complex would take years to negotiate.3U.S. Reports. Virginia v. West Virginia Shifting one district’s worth of conservative voters from a blue state to a red one would not go unnoticed on either side of the aisle.
What Would Actually Change for Residents
The tax picture is more complicated than “Idaho is cheaper.” Oregon has no state sales tax; Idaho charges 6 percent on most purchases. Oregon’s top marginal income tax rate reaches 9.9 percent, one of the highest in the country. Idaho uses a flat 5.3 percent income tax with the first several thousand dollars of income exempt.6Idaho State Tax Commission. Individual Income Tax Rate Schedule For most earners in eastern Oregon, the income tax cut would likely outweigh the new sales tax. Someone with modest income who spends most of it locally might break even or come out behind.
Land use would loosen. Oregon enforces 19 statewide planning goals that every city and county must follow, with local comprehensive plans reviewed by the Land Conservation and Development Commission.7Department of Land Conservation and Development. Oregon’s Statewide Land Use Planning Goals Urban growth boundaries restrict where development can happen, and agricultural and forest lands receive strong protections. Idaho has no comparable statewide system, leaving most land use to local governments. Water rights use the same prior-appropriation doctrine in both states, but Idaho has administered the system more aggressively and completed a decades-long adjudication covering close to 90 percent of its water; Oregon’s adjudications have been piecemeal.
Cannabis would flip. Oregon legalized recreational cannabis for adults 21 and older.8Oregon State Legislature. Oregon Revised Statutes Chapter 475C – Cannabis Regulation Idaho criminalizes marijuana possession entirely. Residents in transferred counties would move from legal cannabis to criminal penalties overnight. Court systems, law enforcement structures, school funding formulas, business and professional licensing, health care networks, utility regulations, and environmental permits would all need to be replaced or renegotiated. Disentangling Oregon’s public employee retirement obligations for workers in thirteen counties would be a legal project on its own.
The Realistic Assessment
Winning advisory votes in thirteen counties is a real accomplishment and shows real dissatisfaction, and the effort has sustained itself for over five years. But local enthusiasm is the easiest of three progressively harder hurdles. Oregon’s refusal to engage is structural, Idaho’s interest cools as the numbers get closer, and Congress has shown no appetite to referee interstate border disputes that would set a precedent for every other region where rural voters feel alienated from their state capital. The most realistic near-term effect of Greater Idaho may be indirect pressure on Salem to take rural concerns more seriously, rather than an actual line on a new map.