- Malheur Butte Church, a church in Malheur County
- Perrin Island, an island in Malheur County
- Pickett Lake, a lake in Crook County
- Picture Flat, a plain in Lake County
- Picture Rock Prairie, a plain in Douglas County
- Picture Tree Springs, a spring in Lake County
- Pidgeon Falls, an overfalls in Coos County
- Pie Creek, a stream in Douglas County
- Piersol Well, a well in Harney County
- Pig Iron Lookout in Douglas County
- Pig Iron Trail in Douglas County
- Pigeon Spring, a spring in Harney County
- Pigeon-toe Lake, a plain in Malheur County
- Pigtail Reservoir, a reservoir in Malheur County
- Pike Creek, a stream in Harney County
- Pike Ranch in Lake County
- Pikes Crossing Recreation Site in Klamath County
- Piledriver Creek, a stream in Coos County
- Pill Pond, a reservoir in Klamath County
- Pilot Lake Reservoir, a reservoir in Lake County
- Pilot Rock in Lane County
- Pine Bench, a bench in Douglas County
- Pine Creek, a stream in Lane County
- Pine Creek Cow Camp in Harney County
- Pine Creek Ranch in Harney County
- Pine Knoll Basin, a depression in Harney County
- Pine Lake, a reservoir in Lake County
- Pine Meadows Campground in Lane County
- Pine Ridge, a ridge in Lake County
- Pine Spring, a spring in Klamath County
- Pine Spring Basin, a depression in Harney County
- Pine Spring Canyon, a valley in Harney County
- Pine Spring Canyon Reservoir, a reservoir in Harney County
- Pine Tree Creek, a stream in Douglas County
- Pine Tree Spring, a spring in Harney County
- Pinewan Lake, a lake in Klamath County
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- Pinhead Reservoir, a reservoir in Malheur County
- Pinkie Spring, a spring in Harney County
- Pinky Reservoir, a reservoir in Malheur County
- Pinnacle Creek, a stream in Douglas County
- Pinnacle Reservoir, a reservoir in Malheur County
- Pinto Creek, a stream in Lane County
- Pinto Horse Reservoir, a reservoir in Malheur County
- Pinto Lake, a lake in Lake County
- Pinto Mountain Way in Lane County
- Pinto Spring, a spring in Harney County
- Pioneer Cemetery in Malheur County
- Pioneer Gulch, a valley in Lane County
- Pioneer Recreation Site in Coos County
- Pioneer Way in Lane County
- Pipe Clamp Spring, a spring in Harney County
- Pipe Spring, a spring in Lake County
- Pipeline Creek, a stream in Curry County
- Pipeline Well, a well in Harney County
- Piper Creek, a stream in Lane County
- Pistol Canyon, a valley in Malheur County
- Pistol Lake, a plain in Lake County
- Pitch Creek, a stream in Lane County
- Pitch Fork Reservoir, a reservoir in Malheur County
- Pitch Lake, a lake in Klamath County
- Pitch Log Creek, a stream in Klamath County
- Pitch Log Spring, a spring in Klamath County
- Pitcher Creek, a stream in Lane County
- Pitcher Ranch in Lake County
- Pitt Lake, a lake in Lake County
- Pittenger Creek, a stream in Lane County
- Piute Creek, a stream in Malheur County
- Piute Lake Bed, a plain in Malheur County
- Piute Reservoir, a reservoir in Lake County
- Piute Rock in Klamath County
- Piute Spring, a spring in Malheur County
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