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- Salina Public Schools, Salina, Mayes County
- Sallisaw Public Schools, Sallisaw, Sequoyah County
- Sand Springs Public Schools, Sand Springs, Tulsa County
- Sapulpa Public Schools, Sapulpa, Creek County
- Sasakwa Public Schools, Sasakwa, Seminole County
- Savanna Public Schools, Savanna, Pittsburg County
- Sayre Public Schools, Sayre, Beckham County
- Schulter Public Schools, Schulter, Okmulgee County
- Seiling Public Schools, Seiling, Dewey County
- Seminole Public Schools, Seminole, Seminole County
- Sentinel Public Schools, Sentinel, Washita County
- Sequoyah Public Schools, Claremore, Rogers County
- Shady Grove Public School, Hulbert, Cherokee County
- Shady Point Public School, Shady Point, Le Flore County
- Sharon-Mutual Public Schools, Mutual, Woodward County
- Shattuck Public Schools, Shattuck, Ellis County
- Shawnee Public Schools, Shawnee, Pottawatomie County
- Shidler Public Schools, Shidler, Osage County
- Silo Public Schools, Durant, Bryan County
- Skelly Public School, Watts, Adair County
- Skiatook Public Schools, Skiatook, Tulsa County
- Smithville Public Schools, Smithville, McCurtain County
- Snyder Public Schools, Snyder, Kiowa County
- Soper Public Schools, Soper, Choctaw County
- South Coffeyville Public Schools, South Coffeyville, Nowata County
- South Rock Creek Public School, Shawnee, Pottawatomie County
- Spavinaw Public School, Spavinaw, Mayes County
- Sperry Public Schools, Sperry, Tulsa County
- Spiro Public Schools, Spiro, Le Flore County
- Springer Public Schools, Springer, Carter County
- Sterling Public Schools, Sterling, Comanche County
- Stidham Public School, Eufaula, McIntosh County
- Stigler Public Schools, Stigler, Haskell County
- Stillwater Public Schools, Stillwater, Payne County
- Stilwell Public Schools, Stilwell, Adair County
- Stonewall Public Schools, Stonewall, Pontotoc County
- Straight Public School, Guymon, Texas County
- Stratford Public Schools, Stratford, Garvin County
- Stringtown Public Schools, Stringtown, Atoka County
- Strother Public Schools, Seminole, Seminole County
- Stroud Public Schools, Stroud, Lincoln County
- Stuart Public Schools, Stuart, Hughes County
- Sulphur Public Schools, Sulphur, Murray County
- Sweetwater Public Schools, Sweetwater, Roger Mills County
- Swink Public School, Swink, Choctaw County
Read more about this topic: List Of School Districts In Oklahoma