NOPO
| 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) |