PHB may refer to:
Science and technology Per-hop behaviour, in the DiffServ world Polyhydroxybutyrate, a biopolymer Prohibitin, a human gene
Transportation Pedestrian hybrid beacon, a type of traffic signal Parnaíba-Prefeito Dr. João Silva Filho International Airport (IATA code), Brazil Phoebus Apollo Aviation (ICAO code), a small airline in South Africa
Organisations Peterhouse Boys' School, a private boys' high school in Zimbabwe Platinum Habib Bank (Bank PHB), a commercial bank in Nigeria, a member of the Bank PHB Group
Other uses Personal health budgets, a stated funded healthcare package Bachelor of Philosophy (PhB), a degree Pointy-haired boss, a character from the Dilbert cartoons Player's Handbook, a rulebook for role-playing game Dungeons & Dragons PHB (bicycle), a hydrogen bicycle Pig Heart Boy, a children's book by Malorie Blackman, made into a television show Proton Holdings Berhad, a Malaysian automotive company