| Acronym | Definition |
|---|
| NOPO➣North Portland (Portland, Oregon neighborhood) |
| NOPO➣Northern Pygmy Owl (bird breed) |
| NOPO➣Nose and Oral Protection Only (helmets) |
| NOPO➣Negotiated Online Peer Observation Project (UK) |
| NOPO➣Nijedan Od Ponudjenih Odgovora (Serbian: None of Our Answers; political party; Serbia) |
| NOPO➣Nuclear Operations Planning Office (US DoD) |
| NOPO➣New Orleans Philharmonic Orchestra (New Orleans, LA) |
| NOPO➣No Person Operation (railway industry) |