ONDP
| Acronym | Definition |
|---|---|
| ONDP | Ontario New Democratic Party |
| ONDP | Oman National Dairy Products Co., Ltd. (Oman) |
| ONDP | Oficina Nacional de la Defensa Publica (Spanish: Office of National Drug Policy; Dominican Republic) |
| ONDP | Ohio National Day of Prayer (est. 1991) |