PHF is a three letter acronym meaning:
Paired Helical Filaments, a term for aggregations of protein in the brain, in conditions such as Alzheimer's disease The Pakistan Hockey Federation, national governing body for field hockey Patrick Henry Field, the IATA code for the Newport News/Williamsburg International Airport Perfect Hair Forever, an American animated television comedy Perfect hash function, a set of hash functions which generate no collisions. Potentially Hazardous Food, a food safety classification Potomac Horse Fever, an illness affecting horses caused by Neorickettsia risticii. Premier Hockey Federation, a professional women's ice hockey league located in the United States & Canada. Public Health Foundation Putting Hartlepool First, a localist English political party based in Hartlepool.