- Pretty Lake Trail in Klamath County
- Pretty Rock Reservoir, a reservoir in Malheur County
- Preuss Post Office (historical), a post office in Coos County
- Price Creek, a stream in Curry County
- Price Post Office (historical), a post office in Crook County
- Priday Ditch, a canal in Lake County
- Priday Lake, a lake in Lake County
- Priday Reservoir, a reservoir in Lake County
- Priday Spring, a spring in Lake County
- Primitive Campground in Lane County
- Prince Albert Reservoir, a reservoir in Malheur County
- Princess Creek, a stream in Klamath County
- Princess Creek Recreation Site in Klamath County
- Princeton Post Office, a post office in Harney County
- Pringle Flat Reservoir, a reservoir in Crook County
- Privy Spring, a spring in Klamath County
- Professor Spring, a spring in Harney County
- Prong Creek, a stream in Douglas County
- Propeller Meadows, a plain in Harney County
- Prospect Creek, a stream in Lane County
- Prospect Reservoir, a reservoir in Malheur County
- Prospectors Reservoir, a reservoir in Harney County
- Prosper Post Office (historical), a post office in Coos County
- Pryor in Lane County
- Public Waterhole, a spring in Harney County
- Pucker Spring, a spring in Lane County
- Pucket Creek, a stream in Douglas County
- Puddin Creek, a stream in Lane County
- Puddin Rock in Lane County
- Puddin Rock Creek, a stream in Lane County
- Puddle Spring, a spring in Lake County
- Puddle Spring Work Center in Lake County
- Pueblo Mountains Wilderness Study Area, a park in Harney County
- Pueblo Reservoir, a reservoir in Harney County
- Pueblo Valley, a valley in Harney County
- Pueblo Well, a well in Harney County
- Pug Allen Spring, a spring in Malheur County
- Pugh Creek, a stream in Lane County
- Pulpit Rock in Klamath County
- Puma Creek, a stream in Lane County
- Puma Creek Recreation Site in Lane County
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- Pumice Flat, a plain in Klamath County
- Pumice Waterhole, a reservoir in Deschutes County
- Pumice Well, a well in Klamath County
- Pump Ditch, a canal in Malheur County
- Puppydog Creek, a stream in Lake County
- Puppydog Spring, a spring in Lake County
- Purdy Creek, a stream in Douglas County
- Purser Spring, a spring in Malheur County
- Purvis Drain, a canal in Malheur County
- Pyburn Creek, a stream in Coos County
- QT Spring, a spring in Malheur County
- Quail Creek, a stream in Harney County
- Quail Creek Reservoir, a reservoir in Harney County
- Quarry Reservoir, a reservoir in Harney County
- Quartz Creek, a stream in Lake County
- Quartz Mountain Post Office (historical), a post office in Lake County
- Question Reservoir, a reservoir in Lake County
- Quick Draw Spring, a spring in Malheur County
- Quick Fill Reservoir, a reservoir in Malheur County
- Quicksand Reservoir, a reservoir in Malheur County
- Quicksand Spring, a spring in Malheur County
- Quinn Lakes, a lake in Lane County
- Quintus Park, a park in Douglas County
- Quita Creek, a stream in Klamath County
- R D Spring, a spring in Harney County
- R K Spring, a spring in Harney County
- R N A Spring, a spring in Klamath County
- R T Spring, a spring in Harney County
- R W Spring, a spring in Malheur County
- RIL Spring, a spring in Harney County
- Rabbit Creek, a stream in Lake County
- Rabbit Run Reservoir, a reservoir in Malheur County
- Racehorse Well, a well in Malheur County
- Rader Creek, a stream in Douglas County
- Radio Springs Reservoir, a reservoir in Harney County
- Ragged Rock Spring, a spring in Harney County
- Ragsdale Creek, a stream in Coos County
- Rooke and Higgins County Park Boat Ramp, a park in Coos County
- The Punchbowl, a depression in Lake County
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