TPN may refer to:

• Total parenteral nutrition
• Triphosphopyridine nucleotide, the previous name for nicotinamide adenine dinucleotide phosphate (NADP⁺)
• Task Positive Network, see Dorsal attention network

• Towarzystwo Przyjaciół Nauk (Society of Friends of Science) in Warsaw

• 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)

This disambiguation page lists articles associated with the title TPN.
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