Ars may refer to:
- Ars (slang), Israeli slang referring to a stereotype of a male of coarse manner, flashy jewelry, and typically working class socioeconomic level
- Ars Electronica, an Austrian organisation founded around a festival for art, technology and society
- Ars Technica, a technology-related website for PC enthusiasts
- Ars (film), a 1959 French film directed by Jacques Demy
- Sjoerd Ars (b .1984) a Dutch footballer
Ars, Ars-on... or Ars-of... is the name of several communes in France:
- Ars, Charente, in the Charente département
- Ars, Creuse, in the Creuse département
- Ars-en-Ré, in the Charente-Maritime département
- Ars-Laquenexy, in the Moselle département
- Ars-les-Favets, in the Puy-de-Dôme département
- Ars-sur-Formans, in the Ain département
- Ars-sur-Moselle, in the Moselle département
ARS may refer to:
- ARS, ISO 4217 currency code for the Argentine peso
- Acoustic resonance spectroscopy, a non-destructive acoustic method of physicochemical analysis
- Acute radiation syndrome, a form of radiation poisoning
- Action Request System
- Acute retroviral syndrome
- African red slip ware, a type of Roman pottery
- Agricultural Research Service
- Airline Reservations System
- Alliance for the Re-liberation of Somalia
- alt.religion.scientology, a discussion board for Scientology critics
- American Racing Series
- American Residential Services, also known as ARS/Rescue Rooter
- American Rocket Society
- Arizona Revised Statutes
- Archives of the Republic of Slovenia
- Armenian Relief Society
- ARS++, a programming language
- ARS (bodyboard)
- ARS, U.S. Navy hull classification symbol for Rescue and Salvage Ship
- Atlanta Rhythm Section, an American rock band
- Auction rate security
- Audience Response System
- Australian Rugby Shield, an Australian national Rugby union competition
- Autonomously replicating sequence, in yeast DNA
- Automatic Route Selection
- Automatic Route Setting, part of the IECC computerised railway signalling system