PNF

PNF may refer to:

Places

 * Nature Park of Faial, on Faial, Azores, Portugal
 * Nature Park of Flores, on Flores, Azores, Portugal
 * Penyffordd railway station, Wales

Science and mathematics

 * PNF stretching, in exercise
 * Prenex normal form, in predicate calculus
 * Primary nonfunction in liver transplantation

Other uses

 * National Fascist Party (Partito Nazionale Fascista), Italy
 * Pakistan Netball Federation
 * Pilot not flying