| Abbreviation | Definition |
|---|---|
| CHS | Chestatee High School |
| CHS | Christiansburg High School |
| CHS | Christopher High School |
| CHS | Churchill High School |
| CHS | Cienega High School |
| CHS | Clackamas High School |
| CHS | Claremont High School |
| CHS | Clarkston High School |
| CHS | Clements High School |
| CHS | Clifton High School |
| CHS | Colchester High School |
| CHS | Columbine High School |
| CHS | Coppell High School |
| CHS | Corvallis High School |
| CHS | Coventry High School |
| CHS | Creekside High School |
| CHS | Croatan High School |
| CHS | Cupertino High School |
| CHSA | College In High School Alliance |
| CHSB | Cave Hill School of Business |