| Abbreviation | Definition |
|---|---|
| NSGIC | National States Geographic Information Council |
| NSHA | Nasarawa State House of Assembly |
| NSW | New South West |
| NSWC | North Shore Water Commission |
| NSWC | Northumberland Solid Waste Commission |
| NSZ | North Shore Zone |
| NT | North Texas |
| NTD | North Texas Division |
| NTL | North Twin Lakes |
| NTLA | Northern Territory Legislative Assembly |
| NTPA | North Texas Paralegal Association |
| NTR | North Texas Region |
| NTRA | National Telecommunication Regulatory Authority |
| NTS | Nevada Test Site |
| NTSA | Neighborhood Traffic Safety Alliance |
| NTSF | National Tobacco Settlement Fund |
| NTTP | North Toronto Treatment Plant |
| NTX | North Texas |
| NU | Northeastern Utah |
| NU | Nunavut |