AEX may refer to:
Aex (mythology), a figure in Greek mythology AEX index (Amsterdam Exchange index), a stock market index ISO 639:aex, a spurious-language code retired in 2008 Alexandria International Airport (Louisiana), US by IATA code
See also AEX cfiXML, an automated information-exchange schema for engineered equipment Hexachaeta aex, a species of fruit fly AEXS (aromatase excess syndrome), a rare condition that results in excess estrogen