Geography and Places
- Adair Village
- Adams
- Adrian
- Community of Airlie (Benton County)
- Albany
- Alsea (Alcea)
- Amelia City
- Amity
- City of Antelope and Muddy Ranch
- Applegate River
- Applegate Trail
- Elmer Ivan Applegate (1867-1949)
- Arlington
- Ashland
- Athena
- Auburn
- Aurora
- Bayocean
- City of Boyd
- Camp White
- Cascade Locks
- Classical Chinese Garden
- John Colter (ca. 1775-1813)
- Columbia River Gorge National Scenic Area
- Columbia River Bar Pilots
- Columbia River Inter-Tribal Fish Commission
- Columbia River Highway
- Columbia Villa (New Columbia)
- Coos Bay
- Council of Table Rock
- Crater Lake National Park
- Crooked River
- Crooked River Project
- Culver
- Deschutes Land Trust
- City of Detroit
- Dufur
- Echo
- Eight Dollar Mountain
- Elgin Opera House
- Estacada
- Fort Clatsop
- French Prairie
- Ghost Towns of the Illinois River Valley
- Cornelius Gilliam (1798 - 1848)
- Guild's Lake
- Heppner flood of 1903
- Bruno Hezeta (1744-1807)
- Illinois Valley Soil & Water Conservation District
- Japanese Americans in Oregon
- John Jeffrey (1828-?)
- Wilhelm Keil (1812-1877)
- Kerbyville
- Kinzua (town)
- Klamath River
- Lake Oswego
- Land Use Planning
- Lithia Park
- Long Creek (town)
- Reub Long (1898-1974)
- Lorane (town)
- Lower Klamath Lake
- Macleay Park
- Malin
- Marionberry
- McKenzie River
- Menucha Retreat and Conference Center
- City of Mt. Angel
- Mt. Tabor Park
- Multnomah County Poor Farm (Edgefield)
- Oaks Bottom
- Peter Skene Ogden (1790-1854)
- Olmsted Portland Park Plan
- Oregon Land Survey, 1851-1855
- Our Mountain
- William Overton
- Owyhee River
- Lafayette Pence (1857-1923)
- Francis Pettygrove (1812-1887)
- Pilot Butte State Scenic Viewpoint
- Pioneer Courthouse Square
- Port of Portland
- Portland Park Blocks
- Rajneeshees
- Senate Bill 100
- Sheridan
- John Shively (1804-1893)
- Silicon Forest
- C.A. Smith Lumber Company
- David Sohappy (1925-1991)
- South Slough National Estuarine Research Reserve
- Springwater Corridor
- Isaac Ingalls Stevens (1818-1862)
- Swan Island
- David Thompson (1770-1857)
- Three Sisters Wilderness
- Tualatin
- Umpqua River
- Vanport
- Waldo (city)
- John B.Waldo (1844-1907)
- Lily Edith White (1866-1944)
- Willamette River
- Willamina (city)
