| Cold Wet Pumice Plateau Basins |
| Klamath Juniper/Ponderosa Pine Woodland |
| Mid-Coastal Sedimentary |
| Pumice Plateau Forest |
| Redwood Zone |
| Southern Cascade Slope |
| Willapa Hills |
| Blue Mountain Basins |
| Canyons and Dissected Highlands |
| Canyons and Dissected Uplands |
| Cascade Crest Montane Forest |
| Cascade Subalpine/Alpine |
| Coastal Lowlands |
| Coastal Siskiyous |
| Coastal Uplands |
| Cold Basins |
| Continental Zone Foothills |
| Continental Zone Highlands |
| Cowlitz/Chehalis Foothills |
| Deep Loess Foothills |
| Deschutes River Valley |
| Deschutes/John Day Canyons |
| Dissected High Lava Plateau |
| Fremont Pine/Fir Forest |
| Grand Fir Mixed Forest |
| High Desert Wetlands |
| High Lava Plains |
| High Southern Cascades Montane Forest |
| Inland Siskiyous |
| John Day/ Clarno Highlands |
| John Day/Clarno Uplands |
| Klamath River Ridges |
| Klamath/Goose Lake Warm Wet Basins |
| Maritime-Influenced Zone |
| Melange |
| Mesic Forest Zone |
| Oak/Conifer Eastern Cascades-Columbia Foothills |
| Owyhee Uplands and Canyons |
| Pleistocene Lake Basins |
| Pluvial Lake Basins |
| Ponderosa Pine/Bitterbrush Woodland |
| Portland/Vancouver Basin |
| Prairie Terraces |
| Rogue/Illinois Valleys |
| Salt Desert Shrub Valleys |
| Semiarid Uplands |
| Serpentine Siskiyous |
| Siskiyou Foothills |
| Southern Cascades |
| Southern Oregon Coastal Mountains |
| Subalpine Zone |
| Treasure Valley |
| Umatilla Plateau |
| Umpqua Cascades |
| Umpqua Interior Foothills |
| Unwooded Alkaline Foothills |
| Valley Foothills |
| Volcanics |
| Wallowas/Seven Devils Mountains |
| Western Cascades Lowlands and Valleys |
| Western Cascades Montane Highlands |
| Willamette River and Tributaries Gallery Forest |
| Yakima Folds |
