Yes, one-year-olds are completely free at both Walt Disney World and Disneyland in 2026. Disney's official policy is that any child under the age of 3 does not require a theme park ticket and can enter the parks for free. Furthermore, at Disney's "All-You-Care-To-Enjoy" buffet and family-style restaurants (like Chef Mickey's or Liberty Tree Tavern), children under 3 can also eat for free from a parent's plate. This makes the "toddler years" a financially attractive time for a family visit. In 2026, while children aged 3 to 9 must pay for a "Child" ticket (which currently ranges from $121 to $217 depending on the day), your one-year-old only needs to be "added" to your hotel reservation for capacity purposes; they will not incur any additional costs for park entry or standard Genie+/Lightning Lane access when accompanying a ticketed adult.