| Abbreviation | Definition |
|---|---|
| MCYS | Ministry of Children and Youth Services |
| MDA | Malir Development Authority |
| MDA | Mississippi Development Authority |
| MDA | Multan Development Authority |
| MDAC | Mississippi Department of Agriculture and Commerce |
| MDAP | Manitoba Drought Assistance Program |
| MDAs | Ministries, Departmentals and Agencies |
| MDBA | Midland Downtown Business Association |
| MDC | Metropolitan District Commission |
| MDC | Metropolitan District Commisson |
| MDC | Michigan Department of Conservation |
| MDCB | Medical Dosimetrist Certification Board |
| MDCB | Miami Dade Canvassing Board |
| MDCH | Michigan Department of Community Health |
| MDD | Mountain Desert District |
| MDE | Maryland Department of the Environment |
| MDE | Michigan Department of Education |
| MDE | Mississippi Department of Education |
| MDED | Missouri Department of Economic Development |
| MDH | Minnesota Department of Health |