AA1

Aa-1 or AA1 may refer to:


 * USS T-1 (SS-52), a United States Navy submarine also known as USS AA-1
 * K-5 (missile), an early Soviet air-to-air missile, NATO reporting name AA-1 'Alkali'
 * Grumman American AA-1, a light aircraft
 * PRR AA1, a Pennsylvania Railroad electric locomotive
 * Phoenix Wright: Ace Attorney, a video game
 * Acer Aspire One, a netbook computer
 * American Airlines Flight 1 (disambiguation), various flights
 * Aa1 is the second highest credit rating given by Moody's Investors Service
 * Bavarian AA I, a steam locomotive
 * 1997 AA1, the alternate name for 8735 Yoshiosakai, an outer main-belt asteroid
 * Gardiner's designated symbol for the hieroglyph that represents a sieve or placenta: