S
- St. Helens School District
- St. Paul School District
- Salem-Keizer School District
- Santiam Canyon School District, Mill City
- Scappoose School District
- Scio School District
- Seaside School District
- Sheridan School District
- Sherman County School District, Wasco
- Sherwood School District
- Silver Falls School District, Silverton
- Sisters School District
- Siuslaw School District, Florence
- South Harney School District, Fields
- South Lane School District, Cottage Grove
- South Umpqua School District, Myrtle Creek
- South Wasco County School District, Maupin
- Spray School District
- Springfield School District
- Stanfield School District
- Suntex School District, Hines
- Sutherlin School District
- Sweet Home School District
Read more about this topic: List Of School Districts In Oregon