| MRH | Mad River Hatchery 
| Others |
| MRH | Main Rotor Head
| Others |
| MRH | Male Right Hand
| Others |
| MRH | Mandeville Regional Hospital
| Others |
| MRH | Maplewood Richmond Heights
| Others |
| MRH | March of Remembrance and Hope
| Others |
| MRH | Marie Robinson Hall
| Others |
| MRH | Market Research Hub
| Others |
| MRH | Mastic Roller Hybrid
| Others |
| MRH | Mataillos Rejuntaos de Hafen
| Others |
| MRH | Mean Relative Humidity
| Others |
| MRH | Mean Roof height
| Others |
| MRH | Measures of Respiratory Health
| Others |
| MRH | Melanocyte stimulating hormone releasing hormone
| Others |
| MRH | Memorial Regional Health
| Others |
| MRH | Memory Repeater Hub
| Others |
| MRH | Men's Residence Hall
| Others |
| MRH | Men's Right Handed
| Others |
| MRH | Mens Right Handed
| Others |
| MRH | Mid Range Hydrocarbons
| Others |
| MRH | Milial Resort Hotels
| Others |
| MRH | Millinocket Regional Hospital
| Others |
| MRH | Mirror with Homelink
| Others |
| MRH | Moab Regional Hospital
| Others |
| MRH | Model Railroad Hobbyist
| Others |
| MRH | Modular Radial Head
| Others |
| MRH | Montgomery Regional Hospital
| Others |
| MRH | Montpelier Re Holdings
| Others |
| MRH | Moore Regional Hospital
| Others |
| MRH | Mountain Rose Herbs
| Others |
| MRH | Multi Resolution Hazard
| Others |
| MRH | Multi Role Helicopter
| Others |
| MRH | My Reliable Handyman
| Others |
| MRH | My Royal Heinie
| Others |