TPN may refer to:
Science and MedicineEdit
- Total parenteral nutrition
- Triphosphopyridine nucleotide, the previous name for nicotinamide adenine dinucleotide phosphate (NADP+)
- Task Positive Network, see Dorsal attention network
OrganisationsEdit
- Towarzystwo Przyjaciół Nauk (Society of Friends of Science) in Warsaw
OtherEdit
- Third-party note or Note verbale, a diplomatic document
- Tupinambá language, by ISO 639 code
- Tiputini Airport, Ecuador
- Treaty on the Prohibition of Nuclear Weapons
- "The Promised Neverland" (Manga / Anime Series)