RPA may refer to:

• RPA (Rubin Postaer and Associates), advertising agency, Santa Monica, California, US
• Republic Airways, ICAO code: RPA

• Republican Party of Arkansas, the affiliate of the Republican Party in Arkansas
• Republican Party of Armenia, a national conservative political party in Armenia
• Republican Party of Australia, a minor political party
• Revolutionary Proletarian Army, a militant communist organization in the Philippines
• Richmond Progressive Alliance, Contra Costa County, California, US
• Rural Payments Agency of the UK Department for Environment, Food and Rural Affairs
• Rwandan Patriotic Army, predecessor of the Rwandan Defence Forces

• Railway Procurement Agency, Ireland
• Rajasthan Police Academy, India
• Regional Plan Association, New York, US
• Register of Professional Archaeologists
• Royal Prince Alfred Hospital, Sydney, Australia
• Rugby Players' Association, England

• RPA (TV series), Australia
• RPA & The United Nations of Sound, a UK band
• Radio del Principado de Asturias, the public radio station of Asturias, Spain

• Random phase approximation, a method in physics
• Remotely piloted aircraft
• Replication protein A
• Recombinase polymerase amplification, isothermal alternative to the polymerase chain reaction (PCR)
• Robotic process automation, a form of business process automation technology
• RPa

• Real Property Administrator
• Registered physician assistant
• Registered Professional Archaeologist
• Request for Public Assistance, a Federal Emergency Management Agency (FEMA) program
• Representation of the People Act, a short title for many legislative Acts in India and the United Kingdom, e.g. Representation of the People Act 1884
• Romanized Popular Alphabet for Hmong language dialects
• Royal Prince Alfred Hospital, Hospital in Sydney, Australia

• All pages with titles containing RPAs
• All pages with titles containing rpa