Disneyland Park, originally Disneyland, is the first of two theme parks built at the Disneyland Resort in Anaheim, California, opened on July 17, 1955. It is the only theme park designed and built under the direct supervision of Walt Disney. It was originally the only attraction on the property, though it was slightly renamed to distinguish it from the expanding complex in the 1990s.

Walt Disney Parks and Resorts, also known as Disney Parks, originally Walt Disney Attractions, is one of The Walt Disney Company's five major business segments. It is responsible for the conception, building, and managing of the company's theme parks and vacation resorts, as well as a variety of additional family-oriented leisure enterprises. It was founded in 1971 after the opening of Magic Kingdom at Walt Disney World in Florida, joining the original Disneyland in California. In 2009, the company's theme parks hosted approximately 119.1 million guests, making Disney Parks the world's most visited theme park company, ahead of the second-most visited, British rival Merlin Entertainments.