NNTC
| Acronym | Definition |
|---|---|
| NNTC | National No-Tillage Conference (agriculture) |
| NNTC | National NeuroAIDS Tissue Consortium (est. 1998) |
| NNTC | Northeast Nebraska Telephone Company (Jackson, NE) |
| NNTC | Norwich and Norfolk Terrier Club |
| NNTC | Nari Nari Tribal Council (est. 2000; Australia) |
| NNTC | Northern Networks Trade Conference (annual) |