| Acronym | Definition |
|---|
| RIHA➣Riigi Infosüsteemi Haldussüsteem (Estonian: State Information System Management System) |
| RIHA➣Research Institute for Housing America |
| RIHA➣Roanoke Island Historical Association (North Carolina, USA) |
| RIHA➣Rock Island Housing Authority (Illinois) |
| RIHA➣Réseau Indépendant d'Hébergeurs Autogerés |
| RIHA➣Rush Institute for Healthy Aging |
| RIHA➣Rhode Island Herpetological Association |