Walt Disney Parks and Resorts is the number one in the global themepark business. Disney has eight parks in the top ten and all parks except for Walt Disney Studios Paris in the top 25.
Disneyland Park Paris is number four in terms of attendence. Number one is still the Magic Kingdom followed by Disneyland Anaheim and Tokyo Disneyland.
The fifth rank goes to Tokyo DisneySea, followed by Epcot, Disney's Hollywood Studios and Disney's Animal Kingdom. The best non-Disney park in terms of attandence is Universal Studios Japan on the ninth rank.
Disney's California Adventure in on rank eleven and Hong Kong Disneyland on rank 16.
Disney is also the number one in the waterparks. Typhoon Lagoon and Blizzard Beach have the first two places.
In the last year WDP&R had over 119mio visitors worldwide, followed by Merlin Entertainment Group with more than 39mio visitors.
In North America Disney holds the first six place, in Europe Disneyland Park is number one followed by Europa Park in Germany and Walt Disney Studios Parks holds the eighth place.
In Asia Tokyo Disneyland is number one followed by Tokyo DisneySea and Hong Kong Disneyland is on the seventh rank.
You can take a closer look on the attendence numbers here:
http://www.teaconnect.org/etea/2009ThemeIndex.pdf