The Walt Disney World Resort is an entertainment complex in Bay Lake and Lake Buena Vista, Florida, near Orlando and Kissimmee, Florida. Opened on October 1, 1971, the resort is owned and operated by Walt Disney Parks and Resorts, a division of The Walt Disney Company. It was initially operated by Walt Disney World Company. The property covers 27,258 acres (43 sq mi; 110 km2), featuring four theme parks, two water parks, twenty-seven themed resort hotels, nine non–Disney hotels, several golf courses, a camping resort, and other entertainment venues, including Disney Springs.

Designed to supplement Disneyland in Anaheim, California, which had opened in 1955, the complex was developed by Walt Disney in the 1960s. "The Florida Project", as it was known, was intended to present a distinct vision with its own diverse set of attractions. Walt Disney's original plans also called for the inclusion of an "Experimental Prototype Community of Tomorrow" (EPCOT), a planned community intended to serve as a test bed for new city living innovations. After extensive lobbying, the Government of Florida created the Reedy Creek Improvement District, a special government district that essentially gave The Walt Disney Company the standard powers and autonomy of an incorporated city. Walt Disney died on December 15, 1966, before construction began. Without Disney spearheading the construction, the company created a resort similar to Disneyland, abandoning experimental concepts for a planned community. Magic Kingdom was the first theme park to open in the complex, in 1971, followed by Epcot in 1982, Disney's Hollywood Studios in 1989, and the most recent, Disney's Animal Kingdom in 1998.

Today, Walt Disney World is the most visited vacation resort in the world, with an average annual attendance of over 52 million.[2] The resort is the flagship destination of Disney's worldwide corporate enterprise, and has become a popular staple in American culture.