Greater Idaho movement

The Greater Idaho movement is an effort in the United States for counties east of the Oregon Cascades to secede from the state of Oregon and join Idaho. It is primarily led by conservative dissatisfaction with the liberal lean of the small but more heavily populated northwestern region of Oregon, driven by the Portland area and other cities in the Willamette Valley; proponents argue that the rural eastern counties have more in common with Idaho, and are not adequately represented in Oregon's state politics.

For this change to be accomplished legally, under current laws it would require approval by local voters via ballot measures, followed by approval from the state legislatures of both Oregon and Idaho, as well as the federal Congress.

As of July 2024, thirteen counties in Oregon had approved ballot measures in favor of Greater Idaho: Baker, Crook, Grant, Harney, Jefferson, Klamath, Lake, Malheur, Morrow, Sherman, Union, Wallowa, and Wheeler.