PPH may refer to
- Patent Prosecution Highway, a set of cooperation agreements between some patent offices
- Permanent Private Hall, a type of educational institution affiliated to the University of Oxford
- Postpartum hemorrhage
- Pound per hour, mass flow unit
- Paid Public Holiday
- Primary pulmonary hypertension, see Pulmonary hypertension
- Procedure for prolapse and hemorrhoids, see Stapled hemorrhoidectomy
- Palomar Pomerado Health, a public health district in San Diego County, California
- Principle of Permissible Harm
- Part per hundred (percentage)