| NNL | Lambasa, Fiji 
| Others |
| NNL | Nameless National Luminaries
| Others |
| NNL | NanoEngineering and NanoDevice Laboratory
| Others |
| NNL | Nanoscience and Nanotechnology Letters
| Others |
| NNL | NASA Night Launch
| Others |
| NNL | National Nameless Luminaries
| Others |
| NNL | National Natural Landmark
| Others |
| NNL | National Natural Landmarks
| Others |
| NNL | National Negro League
| Others |
| NNL | National Ninja League
| Others |
| NNL | National Nuclear Laboratory
| Others |
| NNL | Naval Nuclear Laboratory
| Others |
| NNL | Negro National League
| Others |
| NNL | Neighbors Not Lovers
| Others |
| NNL | Nepal National Library
| Others |
| NNL | Neta n Lior
| Others |
| NNL | Neuroimaging and Neurorehabilitation Laboratory
| Others |
| NNL | Neuroscience for Neurodiverse Learners
| Others |
| NNL | Never Never Land
| Others |
| NNL | New Natural Law
| Others |
| NNL | New Neighbors League, Inc.
| Others |
| NNL | Next To Next To Leading
| Others |
| NNL | Nigeria National League
| Others |
| NNL | No Name Losers
| Others |
| NNL | No Net Loss
| Others |
| NNL | No Nonsense License
| Others |
| NNL | Non Normal Locus
| Others |
| NNL | Nondalton, Alaska USA
| Others |
| NNL | Normal No Load
| Others |
| NNL | Numbers Never Lie
| Others |
| NNL | NW Natural Lighting
| Others |