IOA

IOA may refer to:

Locations

 * Islands of Adventure, a Universal Destinations & Experiences theme park in Orlando, Florida
 * Institute of Astronomy, Cambridge
 * UCL Institute of Archaeology
 * Ioannina National Airport, an airport serving the Greek town of Ioannina

Organizations

 * Indian Olympic Association
 * Independent Olympic Athletes
 * International Olympic Academy
 * Institute of Acoustics, Chinese Academy of Sciences
 * Institute of Acoustics (United Kingdom), a British engineering society
 * International Ombudsman Association
 * International Oversight Advisory, a fictional organization in the Stargate franchise
 * Irish Orienteering Association

Other

 * Input Output Application, a method used to add communicate websites and software, inputting and outputting data.
 * Input-output analysis, an economics model
 * Information object address, IEC 60870-5-104