| | | | | |
| Name | Jurisdiction of Organization |
| Millennium Operations LLC | Delaware |
| Magnum Management Corporation | Ohio |
| Cedar Fair Southwest Inc. | Delaware |
| Michigan's Adventure, Inc. | Michigan |
| Kings Island Company | Delaware |
| Wonderland Company Inc. | Delaware |
| Canada's Wonderland Company | Canada (Nova Scotia) |
| Cedar Point Park LLC | Delaware |
| Valleyfair LLC | Delaware |
| Worlds of Fun LLC | Delaware |
| Dorney Park LLC | Delaware |
| Knott's Berry Farm LLC | Delaware |
| Carowinds LLC | Delaware |
| Kings Dominion LLC | Delaware |
| Michigan's Adventure Park LLC | Delaware |
| Kings Island Park LLC | Delaware |
| Geauga Lake LLC | Delaware |
| California's Great America LLC | Delaware |
| New Braunfels Waterpark LLC | Delaware |
| Galveston Waterpark LLC | Delaware |
| Cedar Point Sports Park LLC | Delaware |
| Sawmill Creek LLC | Delaware |