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.