I haven’t done any technical calculations. On a quick glance I’d say all of this parking is about half the size of the park itself. Very little parking inside the main park boundaries, which is mostly for service vehicles (these spaces aren’t highlighted).
Just something I was curious about, it’s wild how much we accommodate, and how much space we waste, for cars.
Edit: not shown is the large lot southeast of the park. It is about three times the size of the lot to the southwest. There are other lots further outside the picture that add additional parking space not shown. Thanks to RvTV95XBeo for pointing this out.
Top left by the Rise of the Resistance ride is a massive multistory parking structure where most guests park and ride a short tram to the apron between Disneyland and California Adventure.
Much of the ground level only parking lots are for employee parking or simply overflow on peak days.