Originally posted by mbro2002
Animal Kingdom was capped at about 24,000 when it first opened. This number was slowly ramped up as the park got older and with the addition of Asia, I think it is up to around 32,000.
There are different levels of capacity used at all the parks. There is not a point where they are declared "full." Instead, as they fill up, more and more restrictions are made on who can get in. The types of restrictions used vary widely, depending on seasons, holidays, and other reasons.
I'm not familiar with all of the restrictions, but I do know how they handled things when Animal Kingdom first opened and heavy crowds were expected. This is the Phase system we used then:
Phase 1: Only guests who already had tickets were allowed through the auto plaza. (No tickets were sold at the gate)
Phase 2: Only guests with multi-day tickets were allowed in.
Phase 3: Only guests on the last day of a multi-day ticket. (Back then the DAK auto plaza was a prototype for a new system where we could read park tickets at the booths)
Phase 4: Disney Resort guests only.
Phase 5: Complete closure.
These were restrictions put in place for the grand opening phase of DAK and aren't necessarily typical of other situations. The one constant is the Disney Resort guests are always the last group of people closed out of a park.
From what I always heard, Magic Kindgom went into their Phase closures at 75,000 and Epcot at 90,000. I'm not positive about those numbers, though.