Australia is about 9,912 times bigger than New York City.

New York City (including all five boroughs: Manhattan, Brooklyn, Queens, The Bronx, and Staten Island) is approximately 781 sq km, while Australia is approximately 7,741,220 sq km, making Australia 991,093% larger than New York City.
Tip: This to-scale comparison of New York City vs. Australia uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.