| Acronym | Definition |
|---|
| MCHS | Mira Costa High School (CA, USA) |
| MCHS | Middle College High School |
| MCHS | Mt Carmel High School |
| MCHS | Mercy College of Health Sciences (Des Moines, Iowa) |
| MCHS | Martin County High School |
| MCHS | Middle Creek High School (Apex, North Carolina) |
| MCHS | Morris Community High School |
| MCHS | Mason City High School (Louisiana, USA) |
| MCHS | Maria Carrillo High School (Santa Rosa, CA) |
| MCHS | Michigan City High School (Michigan City, Indiana) |
| MCHS | Mayde Creek High School (Katy, Texas, USA) |
| MCHS | Milken Community High School |
| MCHS | Moreau Catholic High School (Hayward, CA) |
| MCHS | Morgan City High School (Morgan City, Louisiana) |
| MCHS | Marine City High School (Marine City, Michigan) |
| MCHS | Memorial Composite High School |
| MCHS | Mascoutah Community High School (Mascoutah, IL) |
| MCHS | Midland County Historical Society (Michigan) |
| MCHS | Memphis Catholic High School (Memphis, Tennessee) |
| MCHS | Massena Central High School (New York) |
| MCHS | Manheim Central High School (Manheim, PA) |
| MCHS | Meridian Charter High School |
| MCHS | Mt. Carmel Health System (Columbus, OH) |
| MCHS | Methodist Children's Home Society |
| MCHS | Moore Catholic High School (Staten Island, New York) |
| MCHS | Marion County Herpetological Society (Florida) |
| MCHS | Marin Continuum of Housing and Services (Novato, CA) |
| MCHS | Mother and Child Health Services |
| MCHS | Marine Common Hardware Suites |