| | Moss Hollow Creek Family Park | Hamlin, Pennsylvania, United States | - | ≤ | - | - |
| | Monroe Piers | Monroe, Michigan, United States | - | | - | s |
| | Monarch Park | Oil City, Pennsylvania, United States | - | | - | |
| | M&M Amusement Park | San Juan, Puerto Rico, United States | - | ≤ | - | ≤ |
| | Miracle Strip Amusement Park | Panama City Beach, Florida, United States | - | | - | |
| | Minerva Amusement Park | Columbus, Ohio, United States | - | | - | |
| | Millsprings Amusement Park | Paducah, Kentucky, United States | - | - | - | |
| | Millbrook Park | New Boston, Ohio, United States | - | | - | ≥ |
| | Midway Electric Park | Wallkill, New York, United States | - | | - | |
| | Midland Beach Park | Staten Island, New York, United States | - | - | - | - |
| | MGM Grand Adventures | Las Vegas, Nevada, United States | - | | - | |
| | Meyer's Lake Park | Canton, Ohio, United States | - | - | - | |
| | Merrimack Park | Methuen, Massachusetts, United States | - | - | - | |
| | Merriland | Loveland, Colorado, United States | - | - | - | |
| | Merrie Way | San Francisco, California, United States | - | | - | |
| | Meridell Park | Pocatello, Idaho, United States | - | - | - | - |
| | Menlo Park | Perkasie, Pennsylvania, United States | - | ≤ | - | ≥ |
| | Memorial Park | Williamsport, Pennsylvania, United States | - | ≤ | - | ≥ |
| | McGuinness Amusement Park | Garden City, New York, United States | - | - | - | ≤ |
| | McCullough Lake Park | Lima, Ohio, United States | - | ≤ | - | s |
| | McCorrough's Kiddie Park | Brooklyn, New York, United States | - | - | - | |
| | Maumee Kiddieland | Maumee, Ohio, United States | - | | - | |
| | Massapequa Zoo & Kiddie Park | Massapequa Park, New York, United States | - | - | - | - |
| | Marshall Hall Park | Bryans Road, Maryland, United States | - | - | - | - |