A1A (disambiguation)

A1A may refer to:

• Florida State Road A1A
• A1A (album), a 1974 album by Jimmy Buffett
• Alpha-1 antitrypsin, a protease inhibitor secreted by the liver
• Several branches of A1 motorway in Switzerland numbered as A1a, located separately in Geneva, Lausanne and Vaud
• continuous wave modulation with Morse code.