OHH
| Acronym | Definition |
|---|---|
| OHH | Oceans and Human Health |
| OHH | Oilfield Helping Hands (est. 2003; Houston, TX) |
| OHH | Oklahoma Heart Hospital (Oklahoma City, OK) |
| OHH | Over the Hill Hockey (Ohio) |
| OHH | Olde Hide House Acton Ontario (Canada) |
| OHH | Oral Hygiene Habit (dentistry) |