NWK

NWK may refer to:
 * Nwk, the Newick tree file format (See List of file formats)
 * Nieuwerkerk aan den IJssel railway station, the station code Nwk
 * Wilmington/Newark Line, the SEPTA line between Newark, Delaware and Center City Philadelphia
 * Wicklesgreuth station, the DS100 code NWK
 * Network Limited, the ASX code NWK
 * Newark Penn Station