| Acronym | Definition |
|---|
| RHS | Royal Horticultural Society |
| RHS | Right Hand Side |
| RHS | Red Hat Society |
| RHS | Rural Housing Service |
| RHS | Richardson High School (Texas) |
| RHS | Royal Historical Society |
| RHS | Ridgewood High School (New Jersey) |
| RHS | Rosemount High School (Rosemount, MN) |
| RHS | Rogers High School |
| RHS | Renton High School (Renton, Washington) |
| RHS | Red Horse Squadron (USAF) |
| RHS | Riverside High School (West Virginia) |
| RHS | Rocky Horror Show |
| RHS | Riverdale High School |
| RHS | Ridgefield High School (Ridgefield, CT, USA) |
| RHS | Redwood High School (Visalia, CA) |
| RHS | Ridge High School (Basking Ridge, New Jersey) |
| RHS | Rectangular Hollow Section |
| RHS | Redlands High School (California) |
| RHS | Royal High School (Simi Valley, California) |
| RHS | Riverview High School |
| RHS | Rockville High School (Rockville, Maryland) |
| RHS | Rochester High School (USA; Australia) |
| RHS | Rutherford High School |
| RHS | Royal Hospital School |
| RHS | Rockford High School (Rockford, Michigan) |
| RHS | Radford High School (Honolulu, Hawaii) |
| RHS | Royal Humane Society |
| RHS | Radiation Health and Safety |
| RHS | Ridgeview High School (Bakersfield, CA) |
| RHS | Rowland High School (Rowland Heights, California) |
| RHS | Ripley High School (various locations) |
| RHS | Rosemead High School (California) |
| RHS | Romeo High School (Romeo, MI) |
| RHS | Reynoldsburg High School (Reynoldsburg, OH) |
| RHS | Ravenwood High School (Brentwood, TN) |
| RHS | Rahway High School (New Jersey) |
| RHS | Rolled Hollow Section (steel tubing) |
| RHS | Reno High School (Nevada) |
| RHS | Ravenna High School |
| RHS | Romeoville High school (Illinois) |
| RHS | Regina High School |
| RHS | Rosary High School (various locations) |
| RHS | Ravenswood High School (West Virginia) |
| RHS | Rickards High School (Tallahassee, FL) |
| RHS | Ruidoso High School (New Mexico) |
| RHS | Ramsey-Hunt Syndrome |
| RHS | Richwoods High School (Peoria, Illinois) |
| RHS | Randallstown High School (Maryland) |
| RHS | Ridley High School |
| RHS | Riverwood High School (Atlanta, Georgia) |
| RHS | Rodeo Historical Society |
| RHS | Rubidoux High School (Riverside, CA) |
| RHS | Roxana High School (Roxana, Illinois) |
| RHS | Rainier High School (Rainier, WA) |
| RHS | Royal High School, Edinburgh (Scotland) |
| RHS | Reidland High School (Paducah, KY) |
| RHS | Rideau High School (Ottawa, Ontario, Canada) |
| RHS | Round Head Screw |
| RHS | Rains High School (Emory, Texas) |
| RHS | Rome Historical Society (New York) |
| RHS | Roswell Historical Society (Roswell, GA) |
| RHS | Restriction on Hazardous Substances (European Union) |
| RHS | Rehydration Station |
| RHS | Rougon High School (Louisiana) |
| RHS | Rainhill High School, United Kingdom |
| RHS | Rolling Horizon Scheme (scheduling method) |
| RHS | Robin Hill Seeds |
| RHS | Rice Hull Stove |
| RHS | Rosenwald High School (Louisiana) |
| RHS | Reach High Standard |
| RHS | Rounded Hollow Section |