AQI

AQI or Aqi may refer to:


 * Air quality index
 * Al-Qaeda in Iraq, a former jihadist organization
 * Al Qaisumah/Hafr Al Batin Airport, Saudi Arabia (IATA code: AQI)
 * Australian Questioning Intonation, a feature of some accents of English
 * AQ Interactive, a former Japanese video game developer and publisher
 * A'Qi, a character from the wuxia novel The Deer and the Cauldron