IAAS can refer to the following:
- Incorporated Association of Architects and Surveyors, former name of the British professional body Association of Building Engineers
- International Association for Shell and Spatial Structures
- Institute of Agriculture and Animal Science, institute of Tribhuvan University, Nepal
- International Association of Students in Agricultural and Related Sciences, Belgium-based international organisation
- International Association for Ambulatory Surgery, Belgium-based international organisation
- Independent Academies Assured Services
- Infrastructure as a service, a cloud computing service model
- Indian Audits and Accounts Service, an Indian Civil Service
|This disambiguation page lists articles associated with the title IAAS.
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