NNK may refer to: NNK, one of the key tobacco-specific nitrosamines derived from nicotine nnk, the ISO 639-3 code for Nankina language Naknek Airport, the IATA code NNK Nemzeti Népegészségügyi Központ, a Hungarian centralised government health agency Northern Neck, the northernmost of Virginia's three peninsulas
See also NNK Rugby Stadium, a multi-use stadium in South Africa