DNP is a three-letter abbreviation which can stand for:
- 2,4-Dinitrophenol, a small organic molecule formerly marketed as a pharmaceutical "diet aid"
- 2,4-Dinitrophenylhydrazine, Brady's reagent, used in organic chemical analysis
- Dai Nippon Printing, the world's largest printing company, based in Japan
- Deutsche Nationalpartei, a former German political party in Czechoslovakia
- Denali National Park, in interior Alaska
- Der Neue Pauly, a more compact edition of Realencyclopädie der Classischen Altertumswissenschaft (Pauly-Wissowa)
- "Did Not Play" a notation used in sports in a box score or a roster listing
- Distance to neutral point, a quantity which is important when considering thermal expansion mismatch
- Distributed Network Protocol (DNP3), a protocol used in SCADA systems between communicating RTU's and IED's
- "Do Not Place", a term used in Printed circuit board design to denote the omitting of a component
- Doctor of Nursing Practice, a practice doctorate in nursing, commonly replacing the dated ND (Nursing Doctorate)
- "Duty Not Paid", in the context of cigarette smuggling
- Dynamic Nuclear Polarisation, a technique used in NMR spectroscopy
- Do Not Post, an artist list on imageboards to prevent copyright infringement
- Dengeki Novel Prize, a literary award by ASCII Media Works