RA

RA may refer to:

Science

Registered Architect, a professional suffix typically used if not also a member of an architecture professional association
Research assistant, a graduate student employed by a college or university for the purpose of academic research
Research associate, a post-doctoral academic researcher
Resident assistant or advisor, a student who supervises tenants of a residence hall
Royal Academician, one of the 80 practicing artists elected as a member of the Royal Academy

Registration authority, a body which maintains lists of international standards codes
Regulatory Affairs, a department in charge of industry-government relations
Rowing Australia, governing body for the sport of rowing in Australia
Resettlement Administration, a New Deal government program in the United States

Regular Army, the permanent force of the US Army that is maintained during peacetime
Provisional Irish Republican Army
Royal Artillery, a Regiment of the British Army
Russian Army, also known as the Russian Ground Forces, formed in 1992

Resolution Advisory, an aircraft instruction from a Traffic Collision Avoidance System

Rescue ambulance
Radhiallahu 'anhu, an Arabic phrase uttered after a righteous person's name
Risk Assessment, a step in a risk management procedure
Risk Analysis
The "Religious Advisor" of a Hash House Harriers club
Remittance advice, a letter sent by a customer to a supplier, to inform the supplier that their invoice has been paid
Republic Act, nomenclature used for Philippine laws from 1946 to 1972 and after 1987