Lake Buena Vista is a city in Orange County, Florida, United States. It is mostly known for being the mailing address for Walt Disney World—although almost all of the resort facilities, including all four theme parks, are physically located in the adjacent city of Bay Lake. It is one of two Florida municipalities controlled by The Walt Disney Company, the other being Bay Lake. The permanent residential population of Lake Buena Vista was 10 at the 2010 census.

Lake Buena Vista is part of the Orlando–Kissimmee–Sanford Metropolitan Statistical Area.

Chapter 67-1965 of the Laws of Florida, incorporating the City of Reedy Creek, was signed into law by Governor Claude R. Kirk, Jr. on May 12, 1967, the same day he also signed chapters 67-764 (creating the Reedy Creek Improvement District) and 67-1104 (incorporating the city of Bay Lake). It was located fully inside the Reedy Creek Improvement District. The city was controlled by the Walt Disney Company and allowed it powers that other area attractions had not had.

Chapter 69-1527, which became a law on July 3, 1969, without the governor's approval, redefined the city boundaries. The city was completely moved, taking over some land that had been part of the City of Bay Lake (and was given up by Chapter 69-836, which became a law the same day) and including some other land that had formerly been unincorporated. Soon after, the City of Reedy Creek was renamed to the City of Lake Buena Vista to better reflect its new location, through which Reedy Creek did not flow. "Buena Vista" comes from the name of the street in Burbank, California, where the Walt Disney Company is headquartered.

The Reedy Creek Improvement District had all the powers of the city and more, raising the questions of why cities needed to be incorporated inside it. Walt Disney's original plans for the site included at least one futuristic living area, a planned "community of the future". This was never built, but some of the ideas were incorporated into the EPCOT theme park and later Celebration, Florida. The only residents of the city are Disney employees and their immediate family members who live in a small community on Royal Oak Court, north of Disney Springs. The only landowners are fully owned subsidiaries of Disney, and rights-of-way for state and county roads.

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