MHRN
| Acronym | Definition |
|---|---|
| MHRN | Mental Health Research Network (UK) |
| MHRN | Montana Human Rights Network (Helena, MT) |
| MHRN | Manitoba Harm Reduction Network (Manitoba, Canada) |
| MHRN | Mental Health Registered Nurse |
| MHRN | Maryland Homeschool Resource Network (website) |
| MHRN | Medically High Risk Newborn |
| MHRN | Mackenzie Highway Repeater Network (radio club; Canada) |