| Acronym | Definition |
|---|
| SIRA | Shiba Inu Rescue Association (dogs) |
| SIRA | Sam and Rose Stein Institute for Research on Aging (University of California, San Diego; La Jolla, CA) |
| SIRA | Southern Intercollegiate Rowing Association (Oak Ridge, TN) |
| SIRA | Securities Industry Regulatory Authority (name announced, then retracted, to represent the combination of NASD and NYSE Regulation) |
| SIRA | Sendai International Relations Association (Japan) |
| SIRA | Síndrome de Insuficiencia Respiratoria Aguda (Spanish: Acute Respiratory Distress Syndrome) |
| SIRA | Sentral Informasi Referendum Acheh (Indonesian: Central Information Referendum Acheh; Acheh, Indonesia) |
| SIRA | Strategic Intelligence Research and Analysis |