RHS
RHS may stand for:
Education
United Kingdom
- Royal Hospital School, an independent naval school at Holbrook, Suffolk
- Royal Historical Society
United States
- Radnor High School, a public high school in Radnor, Pennsylvania
- Ralston High School
- Reepham High School
- Richmond High School (Richmond, California)
- Richmond Secondary School
- Ridgeline High School (Utah), a public high school in Millville, Utah
- Ridgeline High School (Washington), a public high school in Liberty Lake, Washington
- Robbinsville High School (New Jersey)
- Robbinsville High School (North Carolina)
- Roosevelt High School (disambiguation)
Other
- Ramsay Hunt syndrome, several medical conditions
- Rectangular hollow section, a type of metal profile
- Retired husband syndrome
- Revue d'histoire de la Shoah, an academic journal about the Holocaust (Shoah) published in France
- Right-hand side of an equation
- Royal Horticultural Society
- Rural Housing Service, in the USDA Rural Development Agency
- Right angle, hypotenuse and side, indicating a congruent triangle