Pa or PA may refer to: Places Pa, Burkina Faso, a department in Balé Province, West Africa Pā (Māori), a fortified Maori village PA postcode area, named after Paisley, Scotland, United Kingdom Palo Alto, California Panama (ISO country code) Pennsylvania (United States postal abbreviation) Science and technology PA-RISC instruction set architecture developed by Hewlett-Packard Paper size#PA series Pascal (unit), SI derived unit of pressure Peano axioms in mathematical lo… (More on Pa)