MRHS may refer to:
United States high schools
- Mount Rainier High School, Des Moines, Washington
- Mountain Ridge High School (Maryland), Frostburg, Maryland
- Mountain Ridge High School (Arizona), Glendale, Arizona
- Mountain Ridge High School (Utah), Herriman, Utah
- Manchester Regional High School, Haledon, New Jersey
- Marriotts Ridge High School, Marriottsville, Maryland
- Minnechaug Regional High School, Wilbraham, Massachusetts
- Monmouth-Roseville High School, Monmouth, Illinois
- Mesa Ridge High School, Colorado Springs, Colorado
Other uses
- Member of the Royal Horticultural Society
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