| Abbreviation | Definition |
|---|---|
| NRR | National Rescue Ride |
| NRT | Not Really Tough |
| NSI | National Security Intelligence |
| NSNR | National Strategy for Neighbourhood Renewal |
| NSO | Neighbourhood Support Officer |
| NSP | Nevada State Police |
| NSPIS | National Strategy for Police Information Systems |
| NST | Never-ending Suicidal Tendancies |
| NSWP | NSW Police |
| NTA | Notice To Appear |
| NTPA | National Trans Police Association (UK) |
| NTPA | Northern Territory Police Association (Australia) |
| NTSS | No Trace Suspect Stolen |
| NUA | National Underwriting Agencies |
| NVASEC | National Voluntary Aid Societies' Emergency Committee |
| NVC | Non-Verbal Communication |
| NVQ | National Vocational Qualification |
| NWMP | North West Mounted Police |
| NWMP | North-West Mounted Police |
| NWPD | New Westminster Police Department |