| MGM Grand Adventures | Las Vegas, Nevada, United States | - | | - | |
| Meyer's Lake Park | Canton, Ohio, United States | - | - | - | |
| Me World | Busan, South Korea | - | | - | |
| Meteor Valley Water Park | Bao'an, Shenzhen, Guangdong, China | - | | - | |
| Metalworkers' Palace | Tula, Tula, Russia | - | ≤ | - | |
| Merrimack Park | Methuen, Massachusetts, United States | - | - | - | |
| Merriland | Loveland, Colorado, United States | - | - | - | |
| Merrie Way | San Francisco, California, United States | - | | - | |
| Merlin's Magic Land | Lelant, Cornwall, England, United Kingdom | - | ≤ | - | - |
| Meridell Park | Pocatello, Idaho, United States | - | - | - | - |
| Menlo Park | Perkasie, Pennsylvania, United States | - | ≤ | - | ≥ |
| Menghuan Paradise | Longhua, Haikou, Hainan, China | - | ≤ | - | - |
| Memorial Park | Williamsport, Pennsylvania, United States | - | ≤ | - | ≥ |
| Meli Park Heysel | Brussels, Brussels, Belgium | - | | - | |
| MeirLand | Tel Aviv, Tel Aviv, Israel | - | - | - | - |
| Mega Wisata Icakan | Ciamis, West Java, Indonesia | - | | - | |
| Mega Web | Aomi, Koto, Tokyo, Japan | - | | - | |
| Mediterraneo Park | Benidorm, Alicante, Valencian Community, Spain | - | ≤ | - | ≤ |
| McMagic | Amman, Amman, Jordan | - | ≤ | - | ≤ |
| 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 | - | - | - | |
| Maya Cable Amusement Park | Nada, Kobe, Hyōgo, Japan | - | ≤ | - | s |
| Maviland | Samara, Samara, Russia | - | ≤ | - | |