| Mago Vista Beach Club | Arnold, Maryland, United States | - | | - | |
| Maple Grove Park | Lancaster, Pennsylvania, United States | - | ≤ | - | ≥ |
| Maple Leaf Village Amusement Park | Niagara Falls, Ontario, Canada | - | | - | |
| Mapleview Park | Washington, Pennsylvania, United States | - | | - | |
| Marshall Hall Park | Bryans Road, Maryland, United States | - | - | - | - |
| Massapequa Zoo & Kiddie Park | Massapequa Park, New York, United States | - | - | - | - |
| Maumee Kiddieland | Maumee, Ohio, United States | - | | - | |
| McCorrough's Kiddie Park | Brooklyn, New York, United States | - | - | - | |
| McCullough Lake Park | Lima, Ohio, United States | - | ≤ | - | s |
| McGuinness Amusement Park | Garden City, New York, United States | - | - | - | ≤ |
| Memorial Park | Williamsport, Pennsylvania, United States | - | ≤ | - | ≥ |
| Menlo Park | Perkasie, Pennsylvania, United States | - | ≤ | - | ≥ |
| Meridell Park | Pocatello, Idaho, United States | - | - | - | - |
| Merrie Way | San Francisco, California, United States | - | | - | |
| Merriland | Loveland, Colorado, United States | - | - | - | |
| Merrimack Park | Methuen, Massachusetts, United States | - | - | - | |
| Meyer's Lake Park | Canton, Ohio, United States | - | - | - | |
| MGM Grand Adventures | Las Vegas, Nevada, United States | - | | - | |
| Midland Beach Park | Staten Island, New York, United States | - | - | - | - |
| Midway Electric Park | Wallkill, New York, United States | - | | - | |
| Millbrook Park | New Boston, Ohio, United States | - | | - | ≥ |
| Millsprings Amusement Park | Paducah, Kentucky, United States | - | - | - | |
| Minerva Amusement Park | Columbus, Ohio, United States | - | | - | |
| Miracle Strip Amusement Park | Panama City Beach, Florida, United States | - | | - | |