| Acronym | Definition |
|---|
| MCIA | Mexico City International Airport |
| MCIA | Motor Cycle Industry Association (UK) |
| MCIA | Marine Corps Intelligence Activity |
| MCIA | Minnesota Crop Improvement Association (Saint Paul, Minnesota) |
| MCIA | Mactan Cebu International Airport (Philippines) |
| MCIA | Media Center Integrator Alliance |
| MCIA | Mercer County Improvement Authority |
| MCIA | Methyl Chloride Industry Alliance |
| MCIA | Member of the Chartered Institute of Arbitrators |
| MCIA | Marine Corps Intelligence Association, Incorporated (Quantico, VA) |
| MCIA | Message Communication Interface for 2500A (Unit) |