- Saddle Rock
- Saginaw
- Saint Helens
- Saint Joseph
- Saint Louis
- Saint Paul
- Salem
- Salemtowne
- Salishan
- Salishan Beach
- Sams Valley
- San Marine
- Sand Island
- Sand Island
- Sand Island
- Sand Island (historical)
- Sandlake
- Sandy
- Sandy Island
- Santa Clara
- Santiam Terrace
- Saunders Lake
- Sauvie Island
- Scappoose
- Scholls
- Schooner Rocks
- Scio
- Scotts Mills
- Scottsburg
- Sea Lion Rock