Magic Kingdom Park, or simply the Magic Kingdom, is a theme park at the Walt Disney World Resort in Bay Lake, Florida. It opened on October 1, 1971, and is owned and operated by the Walt Disney Company through its Experiences division. The park was initiated by Walt Disney and designed by WED Enterprises. Modeled after Disneyland in Anaheim, California, Magic Kingdom’s layout and attractions share many of the same themed features inspired by fairy tales and Disney intellectual properties.

The park icon is Cinderella Castle, inspired by the fairy-tale castle featured in the 1950 animated film. In 2024, the park hosted 17.83 million visitors, making it the most visited theme park in the world for the eighteenth consecutive year and the most visited theme park in North America for at least the past 24 years. The park has become a cultural touchstone and symbol of modern American pop culture.

Walt Disney was highly involved in planning the Walt Disney World resort complex and park, coming to Florida in person to survey the land, meeting with local officials and announcing the project to the media but not being able to see his vision come to life due to his death in 1966. After Walt's death, his brother Roy Disney took over the project. Walt Disney Productions began construction on the Magic Kingdom and the entire resort in 1967. The park was built as a larger version of Disneyland in California.

Magic Kingdom was built over a series of tunnels called utilidors, a portmanteau of utility and corridor, allowing employees (called "cast members") or VIP guests to move through the park out of sight.

Because of Florida's high water table, the tunnels could not be put underground, so they were built at the existing grade, meaning the park is built on the second story, giving the Magic Kingdom an elevation of 108 feet (33 m). The area around the utilidor was filled in with dirt removed from Seven Seas Lagoon, which was being constructed at the same time. The utilidors were built in the initial construction and were not extended as the park expanded. The tunnels were intended to be designed into all subsequent Walt Disney World parks but were set aside mostly because of financial constraints.

Walt Disney World is a tribute to the philosophy and life of Walter Elias Disney... and to the talents, the dedication, and the loyalty of the entire Disney organization that made Walt Disney's dream come true. May Walt Disney World bring Joy and Inspiration and New Knowledge to all who come to this happy place ... a Magic Kingdom where the young at heart of all ages can laugh and play and learn together.

Magic Kingdom opened as the first part of the Walt Disney World Resort on October 1, 1971, commencing concurrently with Disney's Contemporary Resort and Disney's Polynesian Village Resort. It opened with twenty-three attractions, three unique to the park and twenty replicas of attractions at Disneyland, split into six themed lands, five copies of those at Disneyland (Main Street, U.S.A., Adventureland, Frontierland, Fantasyland, and Tomorrowland) and Liberty Square, exclusive to the Magic Kingdom, rather than the New Orleans Square at Disneyland. The Walt Disney Company promised to increase this number with a combination of replicas and unique attractions. While there is no individual dedication to the Magic Kingdom, the dedication by Roy O. Disney for the entire resort was placed within its gates.

The only land added to the original roster of lands in the park was Mickey's Toontown Fair. The land originally opened in 1988 as Mickey's Birthdayland to celebrate Mickey Mouse's 60th birthday. Later the land was renovated as Mickey's Starland and eventually to Mickey's Toontown Fair. The land was home to attractions such as Mickey's Country House, Minnie's Country House, The Barnstormer at Goofy's Wiseacre Farm, and Donald's Boat. It closed on February 12, 2011, to make way for the expansion of Fantasyland. The Walt Disney World Railroad station in Mickey's Toontown Fair, which opened with Mickey's Birthdayland in 1988, was closed for the duration of the construction. In 2012, the space where Mickey's Toontown Fair sat reopened as a part of Fantasyland, in a sub-section called the Storybook Circus, where an updated Dumbo the Flying Elephant attraction was relocated. The Barnstormer was retained and was re-themed to The Great Goofini.