| Slackwood Elementary School | LAWRENCEVILLE | Public school | PK–3 | 0 |
| Slocum Skewes School | RIDGEFIELD | Public school | 3–8 | 0 |
| Small World Montessori School | Fort Lee | Private school | PK–K | 0 |
| Smalley Elementary School | Bound Brook | Public school | 4–6 | 0 |
| Smart Start Preschool | Fair Haven | Private school | PK–K | 0 |
| Smithville Elementary School | GALLOWAY | Public school | PK–6 | 0 |
| Soaring Heights Charter School | JERSEY CITY | Public school | K–8 | 0 |
| Sojourner Truth Middle School | EAST ORANGE | Public school | 6–8 | 0 |
| Solomon Schechter Day School Of Bergen Co | New Milford | Private school | PK–8 | 0 |
| Solve D'Ippolito Elementary School | VINELAND | Public school | K–5 | 0 |
| Somerdale Park School | SOMERDALE | Public school | PK–8 | 0 |
| Somerset Bible Baptist Christian Ac | Somerset | Private school | K–12 | 0 |
| Somerset County Vocational Technical High School | Bridgewater | Public school | 9–12 | 0 |
| Somerset Elementary Academy | Bridgewater | Public school | K–8 | 0 |
| Somerset Hills Learning Institute | Bedminster | Private school | 1–12 | 0 |
| Somerset Hills Montessori School | Basking Ridge | Private school | PK–K | 0 |
| Somerset School | North Plainfield | Public school | 5–6 | 0 |
| Somerset Secondary Academy | Bridgewater | Public school | 9–12 | 0 |
| Somerset Valley Ymca-gregory Scott Lowe Child Care | Hillsborough | Private school | PK–K | 0 |
| Somerville Elementary School | RIDGEWOOD | Public school | K–5 | 0 |
| Somerville High School | Somerville | Public school | 9–12 | 0 |
| Somerville Middle School | Somerville | Public school | 6–8 | 0 |
| Sonia Sotomayor School No 25 | ELIZABETH | Public school | K–8 | 0 |
| South 17th Street School | NEWARK | Public school | PK–8 | 0 |
| South Amboy Elementary | SOUTH AMBOY | Public school | PK–5 | 0 |
| South Amboy Middle/High School | SOUTH AMBOY | Public school | 6–12 | 0 |
| South Brunswick High School | MONMOUTH JUNCTION | Public school | 9–12 | 0 |
| South End Elementary School | Cedar Grove | Public school | PK–4 | 0 |
| South Harrison Elementary School | HARRISONVILLE | Public school | PK–6 | 0 |
| South Hunterdon Regional Elementary School | Lambertville | Public school | PK–4 | 0 |
| South Hunterdon Regional High School | Lambertville | Public school | 9–12 | 0 |
| South Hunterdon Regional Middle School | Lambertville | Public school | 5–8 | 0 |
| South Jersey Christian Academy | Sicklerville | Private school | PK–8 | 0 |
| South Main Street Elementary School | PLEASANTVILLE | Public school | PK–5 | 0 |
| South Mountain Elementary School | S ORANGE | Public school | K–5 | 0 |
| South Mountain School | MILLBURN | Public school | PK–4 | 0 |
| South Orange Country Day School | South Orange | Private school | PK–K | 0 |
| South Orange Middle School | S ORANGE | Public school | 6–8 | 0 |
| South Plainfield High School | SOUTH PLAINFIELD | Public school | 9–12 | 0 |
| South Plainfield Middle School | SOUTH PLAINFIELD | Public school | 7–8 | 0 |
| South River Early Learning Center | SOUTH RIVER | Public school | PK | 0 |
| South River Elementary School | SOUTH RIVER | Public school | 3–5 | 0 |
| South River High School | SOUTH RIVER | Public school | 9–12 | 0 |
| South River Middle School | SOUTH RIVER | Public school | 6–8 | 0 |
| South River Primary School | SOUTH RIVER | Public school | PK–2 | 0 |
| South Street Elementary School | NEWARK | Public school | PK–8 | 0 |
| South Toms River Elementary School | SOUTH TOMS RIVER | Public school | K–5 | 0 |
| South Valley Elementary School | MOORESTOWN | Public school | PK–3 | 0 |
| Southampton Township School #1 | SOUTHAMPTON | Public school | K–3 | 0 |
| Southampton Township School #2 | SOUTHAMPTON | Public school | 4–5 | 0 |