NPK (disambiguation)

NPK may refer to:
 * NPK label, the most common labeling convention of the labeling of fertilizers
 * NPK (group), a split-off group from TMD located in the Northumberland Park estate of Tottenham
 * Noble Park railway station, the station code NPK
 * Northland Resources, the FWB code NPK
 * National Presto Industries, the NYSE code NPK