NPH may refer to:

Medicine[edit]

• NPH insulin, an intermediate-acting insulin
• National Pediatric Hospital, Cambodia, a government-run pediatric hospital in Phnom Penh
• Normal pressure hydrocephalus, a condition of excessive fluid in the brain

Other[edit]

• Fujicolor Pro (previously NPH 400), a line of professional color negative films
• National Party of Honduras, a centre-right conservative political party in Honduras
• Neil Patrick Harris, American actor, singer, director and magician
• Negative pH (band), an Electronic music band
• New Phyrexia (expansion code: NPH), a Magic: the Gathering expansion set
• North Providence High School, a public high school in North Providence, Rhode Island
• Northeast Party House, an Australian electronic dance band
• Northwestern Publishing House, the official publishing house for the Wisconsin Evangelical Lutheran Synod
• Nuestros Pequeños Hermanos, a charity in Latin America that runs orphanages
• Nyiakeng Puachue Hmong, a writing system used for the Hmong language