| Abbreviation | Definition |
|---|---|
| MCGA | Manitoba Corn Growers Association |
| MCGA | Minnesota Corn Growers Association |
| MCHA | Midwest Collegiate Hockey Association |
| MCLA | Men's Collegiate Lacrosse Association |
| MCLA | Money Consuming Lacrosse Association |
| MCLFA | Madison County Fair and Livestock Association |
| MCMA | Marin County Motorcycle Association |
| MCMA | Michigan Cannabis Manufacturers Association |
| MCMA | Michigan City Mainstreet Association |
| MCMA | Midwest Circulation Management Association |
| MCMA | Mission Creek Merchants Association |
| MCMA | Missouri City Management Association |
| MCMA | Missouri Collegiate Media Association |
| MCPA | Marin County Psychological Association |
| MCPA | Maryland Crime Prevention Association |
| MCPA | Michigan Career Placement Association |
| MCPA | MN Chiefs of Police Association |
| MCPA | Monte Cristo Preservation Association |
| MCPA | Montgomery County Paralegal Association |
| MCPA | Morris County Psychological Association |