| | Kiddie Wonderland | River Edge, New Jersey, United States | - | | - | - |
| | Kiddyland | Tucson, Arizona, United States | - | | - | |
| | Kiddytown | Norridge, Illinois, United States | - | - | - | - |
| | Kid's World | Long Branch, New Jersey, United States | - | - | - | |
| King Richard's Park | Naples, Florida, United States | - | | - | |
| | Kings Castle Land | Whitman, Massachusetts, United States | - | | - | |
| | Kings Park | Norfolk, Nebraska, United States | - | s | - | - |
| | Kishacoquillas Park | Lewistown, Pennsylvania, United States | - | ≤ | - | s |
| | Krazy City | West Nyack, New York, United States | - | - | - | - |
| | Krug Park | Omaha, Nebraska, United States | - | | - | |
| | Lake Ariel Amusement Park | Lake Ariel, Pennsylvania, United States | - | | - | |
| | Lake Chautauqua Park | Chautauqua, New York, United States | - | | - | ≥ |
| Lake City Amusement Park | Guntersville, Alabama, United States | - | | - | |
| | Lake Como Park | Fort Worth, Texas, United States | - | | - | - |
| | Lake Erie Park & Casino | Toledo, Ohio, United States | - | - | - | - |
| | Lake George Action Park | Lake George, New York, United States | - | | - | - |
| | Lake George Amusement Park | Lake George, New York, United States | - | | - | |
| | Lake Lansing Park | Haslett, Michigan, United States | - | | - | |
| | Lake of the Ozarks Amusement Park | Osage Beach, Missouri, United States | - | | - | ≥ |
| | Lakeside Park | Salem, Virginia, United States | - | | - | |
| | Lakeside Park | Flint, Michigan, United States | - | - | - | - |
| | Lakeside Park | Marinette, Wisconsin, United States | - | - | - | - |
| | Lakeside Park | Carthage, Missouri, United States | - | | - | |
| | Lakeside Park | Dayton, Ohio, United States | - | | - | |