- 4H Camp in Coos County
- 52 & Willamette City Park, a park in Lane County
- 5th Street Park, a park in Coos County
- AP Well, a well in Harney County
- Bybee Field Airport, an airport in Malheur County
- Cottonwood Gulch, a valley in Malheur County
- Cottonwood Lake, a lake in Lake County
- Cottonwood Meadow Lake, a reservoir in Lake County
- Cottonwood Post Office (historical), a post office in Lake County
- Cottonwood Recreation Site in Lake County
- Cottonwood Reservoir, a reservoir in Harney County
- Cottonwood Reservoir County Park, a park in Lake County
- Cottonwood Spring, a spring in Malheur County
- Cottonwood Spring Reservoir, a reservoir in Lake County
- Cottonwood Springs, a spring in Klamath County
- Couch Creek, a stream in Malheur County
- Cougar Bend, a stream bend in Lane County
- Cougar Canyon, a valley in Malheur County
- Cougar Canyon Reservoir, a reservoir in Malheur County
- Cougar Creek, a stream in Lake County
- High Point, a stream bend in Malheur County
- High Prairie Creek, a stream in Douglas County
- High Ridge Reservoir, a reservoir in Malheur County
- High Rim Waterhole, a lake in Lake County
- High Table Pond, a reservoir in Klamath County
- Highland Spring, a spring in Harney County
- Highline Ditch, a canal in Harney County
- Highway Lake Waterhole, a spring in Harney County
- Highway Spring, a spring in Lake County
- Highway Waterhole, a reservoir in Deschutes County
- Highway Well, a well in Lake County
- Hilario Spring, a spring in Lake County
- Hiles Reservoir, a reservoir in Douglas County
- Hill Camp Spring, a spring in Lake County
- Hill Creek, a stream in Lane County
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- Hill Reservoir, a reservoir in Lake County
- Mount Pisgah Regional Park, a park in Lane County
- Mount Ray Trail in Lane County
- Mount Scott Post Office (historical), a post office in Douglas County
- Mountain Ash Springs, a spring in Harney County
- Mountain Creek, a stream in Klamath County
- Mountain Meadows, a plain in Douglas County
- Mountain Meadows Trail in Douglas County
- Mountain Spring, a spring in Harney County
- Mountain Well, a well in Curry County
- Mountain Well Camp in Curry County
- Mountain Wells Trail in Curry County
- Sixteen Well, a well in Lake County
- Sixteenmile Creek, a stream in Malheur County
- Sixth Creek, a stream in Lane County
- Skedaddle Spring, a spring in Klamath County
- Skeeter Camp in Lane County
- Skeeter Camp Trail in Lane County
- Skelley in Douglas County
- Skelley Post Office (historical), a post office in Douglas County
- Skellock Draw, a valley in Klamath County
- Ski Lodge Spring, a spring in Lake County
- Skidoo Spring, a spring in Harney County
- Skillet Creek, a stream in Douglas County
- Skimmerhorn Creek, a stream in Douglas County
- Skimmerhorn Recreation Site in Douglas County
- Skimmerhorn Trailhead in Douglas County
- Skinner (historical) in Malheur County
- Skinner Well, a well in Harney County
- Skip Creek, a stream in Douglas County
- Skipper Creek, a stream in Lane County
- Skipper Lakes, a lake in Douglas County
- Skookum Creek, a stream in Lane County
- Skookum Lake, a lake in Lake County
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