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| Appoquinimink High School | C | 3 | | Appoquinimink School District | New Castle | Public | |
| Cab Calloway School of the Arts | B | 1 | | Red Clay Consolidated School District | New Castle | Public | |
| Concord High School | C | 2 | | Brandywine School District | New Castle | Public | |
| Conrad Schools of Science | B | 1 | | Red Clay Consolidated School District | New Castle | Public | |
| Conrad Schools of Science | C | 1 | | Red Clay Consolidated School District | New Castle | Public | |
| Delaware Valley Classical School | C | 1 | | Private | New Castle | Private | |
| Delaware Valley Classical School | B | 1 | | Private | New Castle | Private | |
| Dover High School | C | 1 | | Capital School District | Kent | Public | |
| Greenwood Mennonite School | B | 1 | 1 | Greenwood Mennonite | Sussex | Private | |
| Las Americas ASPIRA Academy | B | 2 | | Las Americas ASPIRA Academy | New Castle | Charter | |
| Mt. Sophia Academy | C | 1 | 1 | Christina | New Castle | Private | |
| Newark Charter School High School | C | 2 | | Newark Charter | New Castle | Charter | |
| Odessa High School | C | 1 | | Appoquinimink School District | New Castle | Public | |
| Odyssey Charter High School | C | 1 | | Odyssey Charter School | New Castle | Charter | |
| P.S. duPont Middle School | B | 2 | | Brandywine School District | New Castle | Public | |
| Springer Middle School | B | 1 | | Brandywine School District | New Castle | Public | |
| Towle Insitute | B | 1 | | Christina School District | New Castle | Private | |
| Towle Insitute | C | 1 | | Christina School District | New Castle | Private | |
| William Penn High School | C | 3 | | Colonial | New Castle | Public | |