ISIA
| Acronym | Definition |
|---|---|
| ISIA | Istituto Superiore per le Industrie Artistiche (Italian: Institute for Industrial Arts) |
| ISIA | International Ski Instructors Association (Belp, Switzerland) |
| ISIA | Information and Software Industry Association (Hong Kong) |
| ISIA | Irish Security Industry Association (est. 1972; Dublin, Ireland) |
| ISIA | Ice Skating Institute of America |
| ISIA | Iowa Sheep Industry Association (Sibley, Iowa) |