I know Harvard accepts roughly 8 per year, of which 3/4 are recruited for crew. But does anybody know the pool of Australian applicants?
Harvard doesn’t public those stats, but they might be able to give you a ball-park figure over the phone.
Stanford currently lists 15 undergraduates from the entire Pacific Basin which would include Australia.
^^ 15 undergraduates is the total of ADMITTED students. The OP is looking for the total number of APPLICANTS. They are trying to figure out their odds, and unfortunately Stanford and Harvard do not publish those numbers.
It does make sense that you would have to be ADMITTED in order to be an undergraduate there.
Stanford lists 54 more ADMITTED graduate students from the Pacific Basin.