PPA may refer to:
Biology and medicine Palpatio per anum, a rectal examination Parahippocampal place area, in the brain Phenylpropanolamine, a largely discontinued decongestant drug Primary progressive aphasia, a neurological condition affecting language
Politics, government, and military Public Policy and Administration, an academic journal on public administration, often abbreviated as PPA Paraguayan People's Army, a group considered a terrorist organization by the Paraguayan state , an Algerian political party Philadelphia Parking Authority, a parking agency in Pennsylvania, United States Philippine Ports Authority Progressive Peoples Alliance, a political party in Nigeria Protestant Protective Association, anti-Catholic organization People's Party of Arunachal, an Indian regional political party Popski's Private Army, a small World War II Special Forces unit of the British 8th Army Thaon di Revel-class offshore patrol vessel (), an offshore patrol vessel of the Italian Navy
Businesses and organizations Businesses Palau Pacific Airways, a defunct charter airline Piraeus Port Authority, Greece
Professional and trade associations Pakistan Pharmacists Association Professional Photographers of America Professional Publishers Association Pictorial Photographers of America, founded by Clarence Hudson White with several others in 1916 Pre-School Playgroups Association, a British charitable organisation
Laws Pension Protection Act of 2006, United States Pollution Prevention Act of 1990, United States Public Procurement Act (Switzerland)
Business Power purchase agreement, a contract for the purchase of electrical energy Purchase price allocation
Mathematics Point pattern analysis, in geometry PPA (complexity), a class of computational search problems
Sports Professional Pickleball Association Professional Putters Association Poker Players Alliance, a USA advocacy/lobbying group
Technology and science Pay-per-action Personal Package Archive, an Ubuntu Linux software repository for managing source packages Polyphthalamide, semi-crystalline high-temperature plastic in the Nylon family Polyphosphoric acid PPa, symbol for the unit of pressure, petapascal (1015 pascal) pPa, symbol for the unit of pressure, picopascal (10−12 pascal)
Other uses Participatory poverty assessment Provisional application, commonly known as a 'provisional patent application' Planning, preparation and assessment, an allocation given to teaching professionals as part of their timetable