This region encompasses the most populated part of the state. North from the Portland Metro area, south down the I-5 corridor.

This portion of the state, adjoining the inner coastal region from Coos Bay east to Roseburg, continuing to the southern most region of the state at Ashland. This region includes the I-5 corridor to the California border.

This region encompasses the north and central coastal area of Oregon, beginning north at Astoria, and ending south at Brookings. This area also encompasses the Willamette Valley, the western Cascades, and Lane and Clatsop Counties.

This region encompasses the part of the state south from The Dalles, including Bend/Redmond, clear to Klamath Falls, covering the most central part of Oregon.

This region encompasses nearly one-third of the eastern portion of the state. It begins north at Pendleton, ending at the most southeastern part of the state.