The nationwide tour begins Aug. 31 at Walt Disney World Resort in Florida and ends at Disneyland Resort in California.
"Since I was a kid, I've dreamed of winning the gold medal and shouting 'I'm going to Disney World," said Phelps. "Now I'm really doing it, and going to Disneyland, too!"
Phelps earned a record-tying eight medals (six gold, two bronze) in Athens and will now visit Walt Disney World Resort in Florida with U.S. swimming teammates Crocker and Krayzelburg (both Athens gold medallists for the 400-meter medley relay) upon returning to the United States.
On Aug. 31, the three swimming champions will serve as grand marshals in a celebratory parade in their honor at the Magic Kingdom and lead a special swimming clinic at Disney's Typhoon Lagoon water park.
The swimmers will then leave Orlando on Sept. 5 and embark on "Disney's Swim with the Stars" tour, visiting key cities across the United States.