Aa-1 or AA1 may refer to:
, a US 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, 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 Hieroglyph that represents a sieve or placenta: 𓐍 (Gardiner's designated symbol AA1)